./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/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_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67e6429a6543f453ac429a23a8d2fcad0657c53add4186ba92445fb458193f20 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:15:21,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:15:21,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:15:21,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:15:21,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:15:21,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:15:21,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:15:21,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:15:21,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:15:21,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:15:21,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:15:21,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:15:21,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:15:21,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:15:21,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:15:21,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:15:21,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:15:21,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:15:21,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:15:21,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:15:21,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:15:21,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:15:21,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:15:21,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:15:21,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:15:21,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:15:21,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:15:21,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:15:21,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:15:21,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:15:21,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:15:21,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:15:21,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:15:21,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:15:21,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:15:21,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:15:21,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:15:21,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:15:21,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:15:21,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:15:21,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:15:21,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:15:21,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:15:21,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:15:21,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:15:21,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:15:21,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:15:21,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:15:21,411 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:15:21,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:15:21,412 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:15:21,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:15:21,413 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:15:21,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:15:21,414 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:15:21,414 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:15:21,414 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:15:21,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:15:21,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:15:21,415 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:15:21,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:15:21,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:15:21,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:15:21,416 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:15:21,416 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:15:21,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:15:21,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:15:21,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:15:21,419 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:15:21,419 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:15:21,420 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:15:21,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:15:21,420 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:15:21,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:15:21,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:15:21,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:15:21,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:15:21,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:15:21,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:15:21,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:15:21,422 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:15:21,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:15:21,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:15:21,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:15:21,423 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_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e6429a6543f453ac429a23a8d2fcad0657c53add4186ba92445fb458193f20 [2021-11-21 01:15:21,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:15:21,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:15:21,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:15:21,800 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:15:21,801 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:15:21,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-11-21 01:15:21,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/data/45d036a83/6c3d2d1198574d869fb4f33576b70628/FLAGceac560c7 [2021-11-21 01:15:22,446 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:15:22,447 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-11-21 01:15:22,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/data/45d036a83/6c3d2d1198574d869fb4f33576b70628/FLAGceac560c7 [2021-11-21 01:15:22,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/data/45d036a83/6c3d2d1198574d869fb4f33576b70628 [2021-11-21 01:15:22,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:15:22,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:15:22,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:15:22,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:15:22,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:15:22,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:15:22" (1/1) ... [2021-11-21 01:15:22,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118043d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:22, skipping insertion in model container [2021-11-21 01:15:22,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:15:22" (1/1) ... [2021-11-21 01:15:22,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:15:22,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:15:23,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:15:23,227 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:15:23,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:15:23,326 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:15:23,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23 WrapperNode [2021-11-21 01:15:23,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:15:23,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:15:23,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:15:23,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:15:23,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,385 INFO L137 Inliner]: procedures = 116, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2021-11-21 01:15:23,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:15:23,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:15:23,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:15:23,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:15:23,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:15:23,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:15:23,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:15:23,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:15:23,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (1/1) ... [2021-11-21 01:15:23,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:15:23,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:23,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:15:23,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:15:23,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:15:23,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:15:23,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:15:23,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:15:23,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:15:23,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:15:23,687 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:15:23,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:15:23,940 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:15:24,029 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:15:24,029 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:15:24,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:15:24 BoogieIcfgContainer [2021-11-21 01:15:24,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:15:24,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:15:24,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:15:24,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:15:24,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:15:22" (1/3) ... [2021-11-21 01:15:24,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ded965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:15:24, skipping insertion in model container [2021-11-21 01:15:24,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:15:23" (2/3) ... [2021-11-21 01:15:24,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ded965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:15:24, skipping insertion in model container [2021-11-21 01:15:24,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:15:24" (3/3) ... [2021-11-21 01:15:24,053 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-11-21 01:15:24,059 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:15:24,059 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-11-21 01:15:24,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:15:24,134 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-21 01:15:24,135 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-11-21 01:15:24,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 20 states have (on average 2.45) internal successors, (49), 43 states have internal predecessors, (49), 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) [2021-11-21 01:15:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:15:24,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:24,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:15:24,180 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-11-21 01:15:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash 157381, now seen corresponding path program 1 times [2021-11-21 01:15:24,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:24,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686495421] [2021-11-21 01:15:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:24,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:24,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:24,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686495421] [2021-11-21 01:15:24,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686495421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:24,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:24,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 01:15:24,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892774337] [2021-11-21 01:15:24,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:24,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:15:24,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:15:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:24,441 INFO L87 Difference]: Start difference. First operand has 44 states, 20 states have (on average 2.45) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-21 01:15:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:24,519 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-21 01:15:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:24,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-21 01:15:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:24,531 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:15:24,531 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 01:15:24,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:24,537 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:24,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 16 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:15:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 01:15:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-21 01:15:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 20 states have (on average 2.1) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-21 01:15:24,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 3 [2021-11-21 01:15:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:24,575 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-21 01:15:24,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-21 01:15:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-21 01:15:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:15:24,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:24,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:15:24,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:15:24,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-11-21 01:15:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash 157382, now seen corresponding path program 1 times [2021-11-21 01:15:24,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:24,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106895497] [2021-11-21 01:15:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:24,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:24,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:24,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106895497] [2021-11-21 01:15:24,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106895497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:24,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:24,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:15:24,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492275097] [2021-11-21 01:15:24,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:24,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:15:24,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:15:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:15:24,673 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-11-21 01:15:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:24,834 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-21 01:15:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-11-21 01:15:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:24,838 INFO L225 Difference]: With dead ends: 40 [2021-11-21 01:15:24,839 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 01:15:24,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:24,842 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:24,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:15:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 01:15:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-21 01:15:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 2.0) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-21 01:15:24,860 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 3 [2021-11-21 01:15:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:24,860 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-21 01:15:24,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-11-21 01:15:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-21 01:15:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:15:24,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:24,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-21 01:15:24,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:15:24,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-11-21 01:15:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash 151335175, now seen corresponding path program 1 times [2021-11-21 01:15:24,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:24,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054391165] [2021-11-21 01:15:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:24,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:24,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:24,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054391165] [2021-11-21 01:15:24,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054391165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:24,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550150082] [2021-11-21 01:15:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:24,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:24,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:25,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:15:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:15:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:15:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:25,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:25,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550150082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:25,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807643536] [2021-11-21 01:15:25,517 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-21 01:15:25,517 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:15:25,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:15:25,528 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:15:25,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:15:25,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-11-21 01:15:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:15:26,465 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:15:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 143 [2021-11-21 01:15:26,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:15:26,998 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:15:27,130 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:15:27,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:15:27,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2021-11-21 01:15:27,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879564614] [2021-11-21 01:15:27,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:15:27,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:15:27,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:15:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:15:27,142 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-11-21 01:15:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:27,327 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-21 01:15:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:15:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 [2021-11-21 01:15:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:27,328 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:15:27,329 INFO L226 Difference]: Without dead ends: 39 [2021-11-21 01:15:27,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:15:27,331 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:27,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 45 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:15:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-21 01:15:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-11-21 01:15:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 2.0) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-21 01:15:27,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 5 [2021-11-21 01:15:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:27,337 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-21 01:15:27,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-11-21 01:15:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-21 01:15:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:15:27,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:27,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:15:27,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:15:27,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:27,539 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-11-21 01:15:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash 396523582, now seen corresponding path program 1 times [2021-11-21 01:15:27,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:27,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056516904] [2021-11-21 01:15:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:27,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:27,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056516904] [2021-11-21 01:15:27,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056516904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109838739] [2021-11-21 01:15:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:27,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:27,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:27,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:15:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:15:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:27,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:27,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 01:15:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:27,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109838739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:27,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1051438004] [2021-11-21 01:15:27,997 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-21 01:15:28,004 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:15:28,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:15:28,004 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:15:28,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:15:28,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-11-21 01:15:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:15:28,643 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:15:28,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 143 [2021-11-21 01:15:28,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:15:29,280 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:15:29,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:15:29,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:15:29,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-21 01:15:29,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956580763] [2021-11-21 01:15:29,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:15:29,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:15:29,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:15:29,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:15:29,478 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-11-21 01:15:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:29,680 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-21 01:15:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:15:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 [2021-11-21 01:15:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:29,683 INFO L225 Difference]: With dead ends: 43 [2021-11-21 01:15:29,683 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 01:15:29,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:15:29,685 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:29,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 70 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:15:29,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 01:15:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-11-21 01:15:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.826086956521739) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-21 01:15:29,691 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-11-21 01:15:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:29,692 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-21 01:15:29,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-11-21 01:15:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-21 01:15:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:15:29,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:29,693 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:29,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:15:29,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:29,907 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-11-21 01:15:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash 353289729, now seen corresponding path program 1 times [2021-11-21 01:15:29,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:29,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471715329] [2021-11-21 01:15:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:29,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:29,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:29,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471715329] [2021-11-21 01:15:29,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471715329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:29,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084817716] [2021-11-21 01:15:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:29,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:29,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:30,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:15:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:30,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:15:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:30,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:30,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084817716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:30,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74930715] [2021-11-21 01:15:30,184 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:15:30,184 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:15:30,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:15:30,185 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:15:30,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:15:30,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-11-21 01:15:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 01:15:30,775 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:15:30,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 143 [2021-11-21 01:15:31,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:15:32,196 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:15:32,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:15:32,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:15:32,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-21 01:15:32,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015324403] [2021-11-21 01:15:32,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:15:32,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:15:32,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:32,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:15:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:15:32,482 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:32,584 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-11-21 01:15:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:32,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:15:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:32,586 INFO L225 Difference]: With dead ends: 73 [2021-11-21 01:15:32,586 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 01:15:32,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:15:32,587 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 175 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:32,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 134 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:15:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 01:15:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2021-11-21 01:15:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.65625) internal successors, (53), 46 states have internal predecessors, (53), 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) [2021-11-21 01:15:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-21 01:15:32,594 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 10 [2021-11-21 01:15:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:32,594 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-21 01:15:32,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-21 01:15:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:15:32,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:32,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:32,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:15:32,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:32,815 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-11-21 01:15:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash 353292354, now seen corresponding path program 1 times [2021-11-21 01:15:32,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:32,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96542099] [2021-11-21 01:15:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:32,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:15:32,856 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:15:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:15:32,912 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:15:32,912 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:15:32,913 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (22 of 23 remaining) [2021-11-21 01:15:32,915 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (21 of 23 remaining) [2021-11-21 01:15:32,915 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (20 of 23 remaining) [2021-11-21 01:15:32,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (19 of 23 remaining) [2021-11-21 01:15:32,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (18 of 23 remaining) [2021-11-21 01:15:32,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (17 of 23 remaining) [2021-11-21 01:15:32,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (16 of 23 remaining) [2021-11-21 01:15:32,916 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (15 of 23 remaining) [2021-11-21 01:15:32,917 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (14 of 23 remaining) [2021-11-21 01:15:32,917 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (13 of 23 remaining) [2021-11-21 01:15:32,917 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (12 of 23 remaining) [2021-11-21 01:15:32,917 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (11 of 23 remaining) [2021-11-21 01:15:32,917 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (10 of 23 remaining) [2021-11-21 01:15:32,918 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (9 of 23 remaining) [2021-11-21 01:15:32,918 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (8 of 23 remaining) [2021-11-21 01:15:32,918 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (7 of 23 remaining) [2021-11-21 01:15:32,918 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (6 of 23 remaining) [2021-11-21 01:15:32,920 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (5 of 23 remaining) [2021-11-21 01:15:32,921 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (4 of 23 remaining) [2021-11-21 01:15:32,921 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (3 of 23 remaining) [2021-11-21 01:15:32,921 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (2 of 23 remaining) [2021-11-21 01:15:32,921 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (1 of 23 remaining) [2021-11-21 01:15:32,922 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK (0 of 23 remaining) [2021-11-21 01:15:32,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:15:32,925 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-21 01:15:32,931 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:15:32,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:15:32 BoogieIcfgContainer [2021-11-21 01:15:32,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:15:32,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:15:32,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:15:32,965 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:15:32,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:15:24" (3/4) ... [2021-11-21 01:15:32,968 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 01:15:33,011 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf3c62b8-12de-40b0-ba96-8c53a67a47a5/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:15:33,011 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:15:33,012 INFO L158 Benchmark]: Toolchain (without parser) took 10248.83ms. Allocated memory was 92.3MB in the beginning and 136.3MB in the end (delta: 44.0MB). Free memory was 57.5MB in the beginning and 44.9MB in the end (delta: 12.7MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2021-11-21 01:15:33,012 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 64.8MB in the beginning and 64.7MB in the end (delta: 30.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:15:33,013 INFO L158 Benchmark]: CACSL2BoogieTranslator took 552.87ms. Allocated memory is still 92.3MB. Free memory was 57.4MB in the beginning and 62.5MB in the end (delta: -5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:15:33,013 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.92ms. Allocated memory is still 92.3MB. Free memory was 62.5MB in the beginning and 60.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:15:33,013 INFO L158 Benchmark]: Boogie Preprocessor took 57.37ms. Allocated memory is still 92.3MB. Free memory was 60.4MB in the beginning and 59.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:15:33,014 INFO L158 Benchmark]: RCFGBuilder took 587.40ms. Allocated memory is still 92.3MB. Free memory was 59.1MB in the beginning and 42.6MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-21 01:15:33,014 INFO L158 Benchmark]: TraceAbstraction took 8930.65ms. Allocated memory was 92.3MB in the beginning and 136.3MB in the end (delta: 44.0MB). Free memory was 42.4MB in the beginning and 47.0MB in the end (delta: -4.6MB). Peak memory consumption was 42.6MB. Max. memory is 16.1GB. [2021-11-21 01:15:33,015 INFO L158 Benchmark]: Witness Printer took 46.57ms. Allocated memory is still 136.3MB. Free memory was 47.0MB in the beginning and 44.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:15:33,017 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 64.8MB in the beginning and 64.7MB in the end (delta: 30.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 552.87ms. Allocated memory is still 92.3MB. Free memory was 57.4MB in the beginning and 62.5MB in the end (delta: -5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.92ms. Allocated memory is still 92.3MB. Free memory was 62.5MB in the beginning and 60.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.37ms. Allocated memory is still 92.3MB. Free memory was 60.4MB in the beginning and 59.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 587.40ms. Allocated memory is still 92.3MB. Free memory was 59.1MB in the beginning and 42.6MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 8930.65ms. Allocated memory was 92.3MB in the beginning and 136.3MB in the end (delta: 44.0MB). Free memory was 42.4MB in the beginning and 47.0MB in the end (delta: -4.6MB). Peak memory consumption was 42.6MB. Max. memory is 16.1GB. * Witness Printer took 46.57ms. Allocated memory is still 136.3MB. Free memory was 47.0MB in the beginning and 44.9MB 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: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 [L518] COND FALSE !(length % 2 == 0) [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1, length++=5] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1, length++=5] [L521] COND FALSE !(i < length) [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, i=1, length=1, length++=5] [L526] COND TRUE i