./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.2.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_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/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_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/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_e0db23be-c34a-46f5-a95c-3edd91ca0597/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 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:42:46,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:42:46,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:42:46,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:42:46,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:42:46,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:42:46,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:42:46,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:42:46,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:42:46,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:42:46,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:42:46,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:42:46,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:42:46,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:42:46,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:42:46,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:42:46,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:42:46,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:42:46,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:42:46,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:42:46,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:42:46,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:42:46,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:42:46,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:42:46,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:42:46,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:42:46,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:42:46,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:42:46,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:42:46,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:42:46,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:42:46,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:42:46,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:42:46,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:42:46,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:42:46,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:42:46,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:42:46,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:42:46,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:42:46,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:42:46,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:42:46,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 00:42:46,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:42:46,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:42:46,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:42:46,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:42:46,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:42:46,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:42:46,544 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:42:46,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:42:46,545 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:42:46,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:42:46,546 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:42:46,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:42:46,547 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:42:46,547 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:42:46,547 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:42:46,547 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:42:46,548 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:42:46,548 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:42:46,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:42:46,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:42:46,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:42:46,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:42:46,550 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:42:46,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:42:46,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:42:46,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:42:46,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:42:46,551 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:42:46,551 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:42:46,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:42:46,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:42:46,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:42:46,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:42:46,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:42:46,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:42:46,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:46,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:42:46,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:42:46,553 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:42:46,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:42:46,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:42:46,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:42:46,553 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_e0db23be-c34a-46f5-a95c-3edd91ca0597/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 [2021-11-21 00:42:46,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:42:46,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:42:46,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:42:46,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:42:46,884 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:42:46,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-11-21 00:42:46,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/cf7a9320f/feb0e64d453b4663b116f17d1775a360/FLAG8bd6dd8f9 [2021-11-21 00:42:47,763 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:42:47,764 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-11-21 00:42:47,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/cf7a9320f/feb0e64d453b4663b116f17d1775a360/FLAG8bd6dd8f9 [2021-11-21 00:42:47,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/cf7a9320f/feb0e64d453b4663b116f17d1775a360 [2021-11-21 00:42:47,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:42:47,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:42:47,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:47,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:42:47,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:42:47,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:47" (1/1) ... [2021-11-21 00:42:47,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bb7466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:47, skipping insertion in model container [2021-11-21 00:42:47,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:47" (1/1) ... [2021-11-21 00:42:48,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:42:48,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:42:48,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:48,473 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:42:48,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:48,569 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:42:48,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48 WrapperNode [2021-11-21 00:42:48,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:48,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:48,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:42:48,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:42:48,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,626 INFO L137 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2021-11-21 00:42:48,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:48,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:42:48,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:42:48,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:42:48,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:42:48,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:42:48,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:42:48,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:42:48,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (1/1) ... [2021-11-21 00:42:48,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:48,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:48,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:42:48,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:42:48,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:42:48,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:42:48,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:42:48,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:42:48,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:42:48,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:42:48,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:42:48,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:42:48,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:42:48,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:42:48,905 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:42:48,907 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:42:49,361 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:42:49,418 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:42:49,418 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:42:49,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:49 BoogieIcfgContainer [2021-11-21 00:42:49,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:42:49,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:42:49,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:42:49,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:42:49,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:42:47" (1/3) ... [2021-11-21 00:42:49,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7188bd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:49, skipping insertion in model container [2021-11-21 00:42:49,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:48" (2/3) ... [2021-11-21 00:42:49,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7188bd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:49, skipping insertion in model container [2021-11-21 00:42:49,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:49" (3/3) ... [2021-11-21 00:42:49,431 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-11-21 00:42:49,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:42:49,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-21 00:42:49,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:42:49,503 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 00:42:49,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-21 00:42:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 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 00:42:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:42:49,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:49,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:42:49,551 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash 5940810, now seen corresponding path program 1 times [2021-11-21 00:42:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:49,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309575232] [2021-11-21 00:42:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:49,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:49,741 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 00:42:49,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:49,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309575232] [2021-11-21 00:42:49,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309575232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:49,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:49,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:42:49,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223427158] [2021-11-21 00:42:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:49,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:42:49,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:42:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:42:49,803 INFO L87 Difference]: Start difference. First operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 00:42:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:49,845 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-21 00:42:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:42:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-21 00:42:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:49,858 INFO L225 Difference]: With dead ends: 49 [2021-11-21 00:42:49,858 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 00:42:49,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:42:49,865 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:49,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 00:42:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-21 00:42:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 2.107142857142857) internal successors, (59), 47 states have internal predecessors, (59), 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 00:42:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2021-11-21 00:42:49,907 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 4 [2021-11-21 00:42:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:49,907 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-11-21 00:42:49,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 00:42:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2021-11-21 00:42:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:42:49,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:49,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:42:49,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:42:49,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:49,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash 185350861, now seen corresponding path program 1 times [2021-11-21 00:42:49,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188824484] [2021-11-21 00:42:49,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:49,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:49,968 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 00:42:49,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:49,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188824484] [2021-11-21 00:42:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188824484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:49,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:49,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 00:42:49,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308395210] [2021-11-21 00:42:49,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:49,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:49,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:49,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:49,973 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 3 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) [2021-11-21 00:42:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,073 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-11-21 00:42:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2021-11-21 00:42:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,076 INFO L225 Difference]: With dead ends: 88 [2021-11-21 00:42:50,076 INFO L226 Difference]: Without dead ends: 87 [2021-11-21 00:42:50,077 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 00:42:50,079 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-21 00:42:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2021-11-21 00:42:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 67 states have internal predecessors, (100), 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 00:42:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2021-11-21 00:42:50,093 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 5 [2021-11-21 00:42:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:50,093 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2021-11-21 00:42:50,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2021-11-21 00:42:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2021-11-21 00:42:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:42:50,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:50,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:42:50,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:42:50,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 185349669, now seen corresponding path program 1 times [2021-11-21 00:42:50,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:50,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939829150] [2021-11-21 00:42:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:50,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:50,143 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 00:42:50,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:50,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939829150] [2021-11-21 00:42:50,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939829150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:50,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:50,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:42:50,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418350234] [2021-11-21 00:42:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:50,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,147 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) 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) [2021-11-21 00:42:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,202 INFO L93 Difference]: Finished difference Result 124 states and 187 transitions. [2021-11-21 00:42:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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 [2021-11-21 00:42:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,205 INFO L225 Difference]: With dead ends: 124 [2021-11-21 00:42:50,205 INFO L226 Difference]: Without dead ends: 123 [2021-11-21 00:42:50,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,207 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-21 00:42:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2021-11-21 00:42:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 104 states have internal predecessors, (174), 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 00:42:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 174 transitions. [2021-11-21 00:42:50,224 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 174 transitions. Word has length 5 [2021-11-21 00:42:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:50,224 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 174 transitions. [2021-11-21 00:42:50,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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) [2021-11-21 00:42:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 174 transitions. [2021-11-21 00:42:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:42:50,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:50,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:42:50,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:42:50,226 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1450814034, now seen corresponding path program 1 times [2021-11-21 00:42:50,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:50,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873904272] [2021-11-21 00:42:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:50,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:50,280 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 00:42:50,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:50,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873904272] [2021-11-21 00:42:50,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873904272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:50,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:50,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:42:50,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885934706] [2021-11-21 00:42:50,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:50,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:50,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,284 INFO L87 Difference]: Start difference. First operand 105 states and 174 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,382 INFO L93 Difference]: Finished difference Result 158 states and 247 transitions. [2021-11-21 00:42:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:50,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-11-21 00:42:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,385 INFO L225 Difference]: With dead ends: 158 [2021-11-21 00:42:50,385 INFO L226 Difference]: Without dead ends: 158 [2021-11-21 00:42:50,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,388 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-21 00:42:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-11-21 00:42:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 121 states have (on average 1.9421487603305785) internal successors, (235), 138 states have internal predecessors, (235), 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 00:42:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 235 transitions. [2021-11-21 00:42:50,405 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 235 transitions. Word has length 6 [2021-11-21 00:42:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:50,406 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 235 transitions. [2021-11-21 00:42:50,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 235 transitions. [2021-11-21 00:42:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:42:50,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:50,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:42:50,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:42:50,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:50,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1450814035, now seen corresponding path program 1 times [2021-11-21 00:42:50,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:50,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501396880] [2021-11-21 00:42:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:50,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:50,468 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 00:42:50,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:50,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501396880] [2021-11-21 00:42:50,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501396880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:50,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:50,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:42:50,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373795324] [2021-11-21 00:42:50,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:50,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:50,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,477 INFO L87 Difference]: Start difference. First operand 139 states and 235 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,571 INFO L93 Difference]: Finished difference Result 153 states and 238 transitions. [2021-11-21 00:42:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-11-21 00:42:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,575 INFO L225 Difference]: With dead ends: 153 [2021-11-21 00:42:50,578 INFO L226 Difference]: Without dead ends: 153 [2021-11-21 00:42:50,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:50,586 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-21 00:42:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2021-11-21 00:42:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.8760330578512396) internal successors, (227), 136 states have internal predecessors, (227), 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 00:42:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 227 transitions. [2021-11-21 00:42:50,622 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 227 transitions. Word has length 6 [2021-11-21 00:42:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:50,627 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 227 transitions. [2021-11-21 00:42:50,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 227 transitions. [2021-11-21 00:42:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:42:50,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:50,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:50,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:42:50,629 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:50,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2025570098, now seen corresponding path program 1 times [2021-11-21 00:42:50,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801055412] [2021-11-21 00:42:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:50,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:50,718 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 00:42:50,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:50,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801055412] [2021-11-21 00:42:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801055412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:50,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:50,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:42:50,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483011653] [2021-11-21 00:42:50,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:50,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:42:50,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:42:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:42:50,723 INFO L87 Difference]: Start difference. First operand 137 states and 227 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 00:42:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,844 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2021-11-21 00:42:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:42:50,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-21 00:42:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,848 INFO L225 Difference]: With dead ends: 233 [2021-11-21 00:42:50,848 INFO L226 Difference]: Without dead ends: 233 [2021-11-21 00:42:50,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:42:50,858 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 75 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 212 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-21 00:42:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 167. [2021-11-21 00:42:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 151 states have (on average 1.8543046357615893) internal successors, (280), 166 states have internal predecessors, (280), 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 00:42:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 280 transitions. [2021-11-21 00:42:50,874 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 280 transitions. Word has length 7 [2021-11-21 00:42:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:50,874 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 280 transitions. [2021-11-21 00:42:50,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 00:42:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 280 transitions. [2021-11-21 00:42:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:42:50,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:50,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:50,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:42:50,876 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1580480621, now seen corresponding path program 1 times [2021-11-21 00:42:50,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:50,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306270572] [2021-11-21 00:42:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:50,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:50,914 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 00:42:50,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:50,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306270572] [2021-11-21 00:42:50,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306270572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:50,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:50,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:42:50,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598163785] [2021-11-21 00:42:50,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:50,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:50,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:50,917 INFO L87 Difference]: Start difference. First operand 167 states and 280 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-11-21 00:42:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:50,987 INFO L93 Difference]: Finished difference Result 385 states and 587 transitions. [2021-11-21 00:42:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:42:50,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2021-11-21 00:42:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:50,991 INFO L225 Difference]: With dead ends: 385 [2021-11-21 00:42:50,991 INFO L226 Difference]: Without dead ends: 385 [2021-11-21 00:42:50,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 00:42:50,995 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 86 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:50,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-21 00:42:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 257. [2021-11-21 00:42:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 241 states have (on average 1.7468879668049793) internal successors, (421), 256 states have internal predecessors, (421), 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 00:42:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 421 transitions. [2021-11-21 00:42:51,017 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 421 transitions. Word has length 8 [2021-11-21 00:42:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:51,018 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 421 transitions. [2021-11-21 00:42:51,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-11-21 00:42:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 421 transitions. [2021-11-21 00:42:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:42:51,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:51,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:51,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:42:51,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1408785848, now seen corresponding path program 1 times [2021-11-21 00:42:51,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:51,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411409883] [2021-11-21 00:42:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:51,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:42:51,077 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:42:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:42:51,142 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:42:51,142 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:42:51,143 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-11-21 00:42:51,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-21 00:42:51,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-21 00:42:51,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 20 remaining) [2021-11-21 00:42:51,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 20 remaining) [2021-11-21 00:42:51,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 20 remaining) [2021-11-21 00:42:51,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 20 remaining) [2021-11-21 00:42:51,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-21 00:42:51,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-21 00:42:51,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-21 00:42:51,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-21 00:42:51,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 20 remaining) [2021-11-21 00:42:51,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 20 remaining) [2021-11-21 00:42:51,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 20 remaining) [2021-11-21 00:42:51,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 20 remaining) [2021-11-21 00:42:51,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 20 remaining) [2021-11-21 00:42:51,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 20 remaining) [2021-11-21 00:42:51,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-11-21 00:42:51,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-11-21 00:42:51,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-11-21 00:42:51,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:42:51,154 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:51,157 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:42:51,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:42:51 BoogieIcfgContainer [2021-11-21 00:42:51,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:42:51,198 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:42:51,198 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:42:51,198 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:42:51,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:49" (3/4) ... [2021-11-21 00:42:51,207 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:42:51,208 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:42:51,208 INFO L158 Benchmark]: Toolchain (without parser) took 3218.28ms. Allocated memory is still 123.7MB. Free memory was 88.6MB in the beginning and 74.1MB in the end (delta: 14.5MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2021-11-21 00:42:51,210 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 40.6MB in the beginning and 40.6MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:42:51,210 INFO L158 Benchmark]: CACSL2BoogieTranslator took 578.48ms. Allocated memory is still 123.7MB. Free memory was 88.6MB in the beginning and 91.8MB in the end (delta: -3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:42:51,211 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.50ms. Allocated memory is still 123.7MB. Free memory was 91.8MB in the beginning and 89.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:42:51,211 INFO L158 Benchmark]: Boogie Preprocessor took 59.39ms. Allocated memory is still 123.7MB. Free memory was 89.7MB in the beginning and 88.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:42:51,212 INFO L158 Benchmark]: RCFGBuilder took 734.02ms. Allocated memory is still 123.7MB. Free memory was 88.2MB in the beginning and 69.8MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-21 00:42:51,212 INFO L158 Benchmark]: TraceAbstraction took 1774.32ms. Allocated memory is still 123.7MB. Free memory was 69.3MB in the beginning and 74.7MB in the end (delta: -5.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:42:51,213 INFO L158 Benchmark]: Witness Printer took 9.54ms. Allocated memory is still 123.7MB. Free memory was 74.7MB in the beginning and 74.1MB in the end (delta: 524.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:42:51,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 40.6MB in the beginning and 40.6MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 578.48ms. Allocated memory is still 123.7MB. Free memory was 88.6MB in the beginning and 91.8MB in the end (delta: -3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.50ms. Allocated memory is still 123.7MB. Free memory was 91.8MB in the beginning and 89.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.39ms. Allocated memory is still 123.7MB. Free memory was 89.7MB in the beginning and 88.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 734.02ms. Allocated memory is still 123.7MB. Free memory was 88.2MB in the beginning and 69.8MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1774.32ms. Allocated memory is still 123.7MB. Free memory was 69.3MB in the beginning and 74.7MB in the end (delta: -5.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 9.54ms. Allocated memory is still 123.7MB. Free memory was 74.7MB in the beginning and 74.1MB in the end (delta: 524.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 49 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 347 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 347 mSDsluCounter, 769 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 415 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 325 IncrementalHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 424 mSDtfsCounter, 325 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=257occurred in iteration=7, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 266 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 87 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:42:51,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/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_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/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 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:42:53,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:42:53,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:42:53,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:42:53,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:42:53,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:42:53,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:42:53,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:42:53,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:42:53,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:42:54,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:42:54,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:42:54,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:42:54,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:42:54,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:42:54,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:42:54,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:42:54,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:42:54,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:42:54,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:42:54,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:42:54,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:42:54,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:42:54,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:42:54,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:42:54,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:42:54,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:42:54,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:42:54,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:42:54,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:42:54,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:42:54,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:42:54,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:42:54,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:42:54,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:42:54,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:42:54,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:42:54,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:42:54,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:42:54,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:42:54,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:42:54,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 00:42:54,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:42:54,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:42:54,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:42:54,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:42:54,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:42:54,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:42:54,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:42:54,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:42:54,091 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:42:54,091 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:42:54,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:42:54,091 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:42:54,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:42:54,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:42:54,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:42:54,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:42:54,093 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:42:54,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:42:54,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:42:54,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:42:54,094 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:42:54,094 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:42:54,094 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:42:54,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:42:54,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:42:54,095 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:42:54,095 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:42:54,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:42:54,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:42:54,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:42:54,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:42:54,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:42:54,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:54,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:42:54,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:42:54,097 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:42:54,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:42:54,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:42:54,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:42:54,098 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_e0db23be-c34a-46f5-a95c-3edd91ca0597/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 [2021-11-21 00:42:54,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:42:54,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:42:54,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:42:54,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:42:54,609 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:42:54,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-11-21 00:42:54,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/c3103b725/29f4c93d67cb479694ac8c0e9195dae7/FLAG2474be9ca [2021-11-21 00:42:55,413 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:42:55,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-11-21 00:42:55,431 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/c3103b725/29f4c93d67cb479694ac8c0e9195dae7/FLAG2474be9ca [2021-11-21 00:42:55,675 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/data/c3103b725/29f4c93d67cb479694ac8c0e9195dae7 [2021-11-21 00:42:55,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:42:55,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:42:55,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:55,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:42:55,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:42:55,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:55" (1/1) ... [2021-11-21 00:42:55,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c4345a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:55, skipping insertion in model container [2021-11-21 00:42:55,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:55" (1/1) ... [2021-11-21 00:42:55,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:42:55,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:42:56,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:56,189 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:42:56,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:56,348 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:42:56,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56 WrapperNode [2021-11-21 00:42:56,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:56,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:56,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:42:56,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:42:56,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,447 INFO L137 Inliner]: procedures = 128, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 119 [2021-11-21 00:42:56,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:56,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:42:56,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:42:56,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:42:56,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:42:56,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:42:56,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:42:56,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:42:56,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:56,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:56,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:42:56,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:42:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 00:42:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:42:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:42:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:42:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:42:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:42:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 00:42:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:42:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:42:56,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:42:56,767 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:42:56,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:42:57,290 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:42:57,296 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:42:57,297 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:42:57,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:57 BoogieIcfgContainer [2021-11-21 00:42:57,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:42:57,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:42:57,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:42:57,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:42:57,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:42:55" (1/3) ... [2021-11-21 00:42:57,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d667780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:57, skipping insertion in model container [2021-11-21 00:42:57,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (2/3) ... [2021-11-21 00:42:57,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d667780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:57, skipping insertion in model container [2021-11-21 00:42:57,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:57" (3/3) ... [2021-11-21 00:42:57,308 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-11-21 00:42:57,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:42:57,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-21 00:42:57,366 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:42:57,375 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 00:42:57,375 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-21 00:42:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 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 00:42:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:42:57,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:57,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:42:57,402 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:57,409 INFO L85 PathProgramCache]: Analyzing trace with hash 28701640, now seen corresponding path program 1 times [2021-11-21 00:42:57,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:57,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013477640] [2021-11-21 00:42:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:57,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:57,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:57,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:57,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:42:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:57,689 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 00:42:57,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:57,778 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 00:42:57,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:57,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013477640] [2021-11-21 00:42:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013477640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:57,781 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:57,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:42:57,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306604853] [2021-11-21 00:42:57,783 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:57,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:57,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:57,836 INFO L87 Difference]: Start difference. First operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 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, 3 states have (on average 1.6666666666666667) 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) [2021-11-21 00:42:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:57,917 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2021-11-21 00:42:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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 [2021-11-21 00:42:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:57,932 INFO L225 Difference]: With dead ends: 107 [2021-11-21 00:42:57,932 INFO L226 Difference]: Without dead ends: 105 [2021-11-21 00:42:57,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 00:42:57,939 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 63 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:57,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-21 00:42:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-21 00:42:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 86 states have internal predecessors, (129), 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 00:42:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2021-11-21 00:42:57,984 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 5 [2021-11-21 00:42:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:57,984 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2021-11-21 00:42:57,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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) [2021-11-21 00:42:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2021-11-21 00:42:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:42:57,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:57,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:42:57,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:58,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:58,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash 889749439, now seen corresponding path program 1 times [2021-11-21 00:42:58,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:58,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954360225] [2021-11-21 00:42:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:58,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:58,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:58,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:42:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:42:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:58,281 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 00:42:58,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:58,317 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 00:42:58,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:58,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954360225] [2021-11-21 00:42:58,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954360225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:58,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:58,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:42:58,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783147257] [2021-11-21 00:42:58,320 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:58,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:58,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:58,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:58,329 INFO L87 Difference]: Start difference. First operand 87 states and 129 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:58,537 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2021-11-21 00:42:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:58,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-11-21 00:42:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:58,542 INFO L225 Difference]: With dead ends: 163 [2021-11-21 00:42:58,543 INFO L226 Difference]: Without dead ends: 160 [2021-11-21 00:42:58,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 00:42:58,545 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 62 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:58,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:42:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-21 00:42:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2021-11-21 00:42:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 120 states have (on average 1.9083333333333334) internal successors, (229), 139 states have internal predecessors, (229), 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 00:42:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 229 transitions. [2021-11-21 00:42:58,591 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 229 transitions. Word has length 6 [2021-11-21 00:42:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:58,591 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 229 transitions. [2021-11-21 00:42:58,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 229 transitions. [2021-11-21 00:42:58,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:42:58,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:58,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:42:58,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:58,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:58,806 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:58,807 INFO L85 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2021-11-21 00:42:58,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:58,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184646136] [2021-11-21 00:42:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:58,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:58,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:58,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:58,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:42:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:42:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:58,947 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 6 treesize of output 5 [2021-11-21 00:42:58,956 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 00:42:58,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:58,979 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 00:42:58,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184646136] [2021-11-21 00:42:58,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184646136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:58,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:58,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:42:58,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071904235] [2021-11-21 00:42:58,986 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:58,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:58,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:58,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:58,992 INFO L87 Difference]: Start difference. First operand 140 states and 229 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:59,205 INFO L93 Difference]: Finished difference Result 211 states and 330 transitions. [2021-11-21 00:42:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-11-21 00:42:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:59,209 INFO L225 Difference]: With dead ends: 211 [2021-11-21 00:42:59,209 INFO L226 Difference]: Without dead ends: 211 [2021-11-21 00:42:59,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 00:42:59,211 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 64 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:59,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 163 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:42:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-21 00:42:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 190. [2021-11-21 00:42:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 172 states have (on average 1.8372093023255813) internal successors, (316), 189 states have internal predecessors, (316), 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 00:42:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 316 transitions. [2021-11-21 00:42:59,231 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 316 transitions. Word has length 6 [2021-11-21 00:42:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:59,232 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 316 transitions. [2021-11-21 00:42:59,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 00:42:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 316 transitions. [2021-11-21 00:42:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:42:59,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:59,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:42:59,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:59,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:42:59,446 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:42:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2021-11-21 00:42:59,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:42:59,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313016106] [2021-11-21 00:42:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:59,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:42:59,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:42:59,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:42:59,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:42:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:42:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:59,551 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 6 treesize of output 5 [2021-11-21 00:42:59,571 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 00:42:59,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:59,645 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 00:42:59,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:59,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313016106] [2021-11-21 00:42:59,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313016106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:59,646 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:59,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 00:42:59,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690091304] [2021-11-21 00:42:59,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:59,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:59,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:42:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:59,654 INFO L87 Difference]: Start difference. First operand 190 states and 316 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-11-21 00:43:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:00,045 INFO L93 Difference]: Finished difference Result 278 states and 428 transitions. [2021-11-21 00:43:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 6 [2021-11-21 00:43:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:00,049 INFO L225 Difference]: With dead ends: 278 [2021-11-21 00:43:00,050 INFO L226 Difference]: Without dead ends: 278 [2021-11-21 00:43:00,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:00,051 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 124 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:00,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 271 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:43:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-21 00:43:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 240. [2021-11-21 00:43:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 224 states have (on average 1.7901785714285714) internal successors, (401), 239 states have internal predecessors, (401), 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 00:43:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 401 transitions. [2021-11-21 00:43:00,098 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 401 transitions. Word has length 6 [2021-11-21 00:43:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:00,099 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 401 transitions. [2021-11-21 00:43:00,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-11-21 00:43:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 401 transitions. [2021-11-21 00:43:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:43:00,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:00,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:00,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:00,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:00,315 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:43:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2021-11-21 00:43:00,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:00,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727580908] [2021-11-21 00:43:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:00,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:00,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:00,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:00,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:43:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:00,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:43:00,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:00,427 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 00:43:00,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:00,453 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 00:43:00,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:00,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727580908] [2021-11-21 00:43:00,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727580908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:00,454 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:00,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:43:00,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768442920] [2021-11-21 00:43:00,454 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:00,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:00,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:00,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:00,456 INFO L87 Difference]: Start difference. First operand 240 states and 401 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 00:43:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:00,498 INFO L93 Difference]: Finished difference Result 240 states and 333 transitions. [2021-11-21 00:43:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-21 00:43:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:00,502 INFO L225 Difference]: With dead ends: 240 [2021-11-21 00:43:00,502 INFO L226 Difference]: Without dead ends: 240 [2021-11-21 00:43:00,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 00:43:00,505 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 101 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:00,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 268 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-21 00:43:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 144. [2021-11-21 00:43:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 143 states have internal predecessors, (229), 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 00:43:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 229 transitions. [2021-11-21 00:43:00,527 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 229 transitions. Word has length 7 [2021-11-21 00:43:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:00,527 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 229 transitions. [2021-11-21 00:43:00,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 00:43:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 229 transitions. [2021-11-21 00:43:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:43:00,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:00,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:00,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:00,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:00,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:43:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 347531241, now seen corresponding path program 1 times [2021-11-21 00:43:00,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:00,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002427206] [2021-11-21 00:43:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:00,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:00,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:00,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:43:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:00,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:43:00,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:00,808 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 00:43:00,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:00,837 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 00:43:00,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:00,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002427206] [2021-11-21 00:43:00,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002427206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:00,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:00,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:43:00,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531446320] [2021-11-21 00:43:00,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:00,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:00,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:00,843 INFO L87 Difference]: Start difference. First operand 144 states and 229 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-11-21 00:43:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:00,900 INFO L93 Difference]: Finished difference Result 283 states and 430 transitions. [2021-11-21 00:43:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2021-11-21 00:43:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:00,903 INFO L225 Difference]: With dead ends: 283 [2021-11-21 00:43:00,903 INFO L226 Difference]: Without dead ends: 283 [2021-11-21 00:43:00,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 00:43:00,907 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 103 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:00,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 196 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:43:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-21 00:43:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 198. [2021-11-21 00:43:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.6559139784946237) internal successors, (308), 197 states have internal predecessors, (308), 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 00:43:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2021-11-21 00:43:00,917 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 8 [2021-11-21 00:43:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:00,918 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2021-11-21 00:43:00,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-11-21 00:43:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2021-11-21 00:43:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:43:00,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:00,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:00,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:01,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:01,134 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:43:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash -527615340, now seen corresponding path program 1 times [2021-11-21 00:43:01,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:01,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775920536] [2021-11-21 00:43:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:01,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:01,136 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:01,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 00:43:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:43:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:01,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:01,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:43:01,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775920536] [2021-11-21 00:43:01,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775920536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:01,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [926931891] [2021-11-21 00:43:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:01,272 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:43:01,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:43:01,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:43:01,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-21 00:43:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:43:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:01,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:01,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [926931891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:01,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538326249] [2021-11-21 00:43:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:01,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:01,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:01,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:01,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:43:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:43:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:01,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:01,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538326249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:01,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:43:01,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-21 00:43:01,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292600323] [2021-11-21 00:43:01,703 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:01,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:43:01,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:43:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:43:01,705 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 00:43:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:02,031 INFO L93 Difference]: Finished difference Result 811 states and 1238 transitions. [2021-11-21 00:43:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:43:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:43:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:02,038 INFO L225 Difference]: With dead ends: 811 [2021-11-21 00:43:02,038 INFO L226 Difference]: Without dead ends: 811 [2021-11-21 00:43:02,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:43:02,040 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 545 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:02,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 811 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:43:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-21 00:43:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 438. [2021-11-21 00:43:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 426 states have (on average 1.619718309859155) internal successors, (690), 437 states have internal predecessors, (690), 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 00:43:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 690 transitions. [2021-11-21 00:43:02,065 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 690 transitions. Word has length 12 [2021-11-21 00:43:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:02,065 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 690 transitions. [2021-11-21 00:43:02,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 00:43:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 690 transitions. [2021-11-21 00:43:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:43:02,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:02,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:02,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:02,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 00:43:02,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:02,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:02,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-21 00:43:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2027186576, now seen corresponding path program 1 times [2021-11-21 00:43:02,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:02,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058563550] [2021-11-21 00:43:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:02,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:02,677 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:02,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 00:43:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:43:02,748 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:43:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:43:02,812 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-21 00:43:02,813 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:43:02,814 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-11-21 00:43:02,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-21 00:43:02,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-21 00:43:02,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 20 remaining) [2021-11-21 00:43:02,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 20 remaining) [2021-11-21 00:43:02,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 20 remaining) [2021-11-21 00:43:02,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 20 remaining) [2021-11-21 00:43:02,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-21 00:43:02,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-21 00:43:02,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-21 00:43:02,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-21 00:43:02,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 20 remaining) [2021-11-21 00:43:02,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 20 remaining) [2021-11-21 00:43:02,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 20 remaining) [2021-11-21 00:43:02,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 20 remaining) [2021-11-21 00:43:02,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 20 remaining) [2021-11-21 00:43:02,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 20 remaining) [2021-11-21 00:43:02,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-11-21 00:43:02,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-11-21 00:43:02,820 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-11-21 00:43:02,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:03,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:43:03,030 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:03,033 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:43:03,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:43:03 BoogieIcfgContainer [2021-11-21 00:43:03,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:43:03,080 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:43:03,080 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:43:03,080 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:43:03,081 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:57" (3/4) ... [2021-11-21 00:43:03,084 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:43:03,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:43:03,084 INFO L158 Benchmark]: Toolchain (without parser) took 7404.07ms. Allocated memory was 65.0MB in the beginning and 92.3MB in the end (delta: 27.3MB). Free memory was 42.5MB in the beginning and 47.0MB in the end (delta: -4.5MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2021-11-21 00:43:03,085 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 65.0MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:43:03,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 664.96ms. Allocated memory is still 65.0MB. Free memory was 42.4MB in the beginning and 42.9MB in the end (delta: -497.9kB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. [2021-11-21 00:43:03,085 INFO L158 Benchmark]: Boogie Procedure Inliner took 97.32ms. Allocated memory is still 65.0MB. Free memory was 42.9MB in the beginning and 40.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:43:03,086 INFO L158 Benchmark]: Boogie Preprocessor took 69.19ms. Allocated memory is still 65.0MB. Free memory was 40.8MB in the beginning and 39.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:43:03,086 INFO L158 Benchmark]: RCFGBuilder took 780.96ms. Allocated memory is still 65.0MB. Free memory was 39.1MB in the beginning and 41.1MB in the end (delta: -2.0MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2021-11-21 00:43:03,087 INFO L158 Benchmark]: TraceAbstraction took 5777.80ms. Allocated memory was 65.0MB in the beginning and 92.3MB in the end (delta: 27.3MB). Free memory was 40.6MB in the beginning and 47.0MB in the end (delta: -6.4MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2021-11-21 00:43:03,087 INFO L158 Benchmark]: Witness Printer took 3.90ms. Allocated memory is still 92.3MB. Free memory is still 47.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:43:03,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 65.0MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 664.96ms. Allocated memory is still 65.0MB. Free memory was 42.4MB in the beginning and 42.9MB in the end (delta: -497.9kB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 97.32ms. Allocated memory is still 65.0MB. Free memory was 42.9MB in the beginning and 40.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.19ms. Allocated memory is still 65.0MB. Free memory was 40.8MB in the beginning and 39.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 780.96ms. Allocated memory is still 65.0MB. Free memory was 39.1MB in the beginning and 41.1MB in the end (delta: -2.0MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5777.80ms. Allocated memory was 65.0MB in the beginning and 92.3MB in the end (delta: 27.3MB). Free memory was 40.6MB in the beginning and 47.0MB in the end (delta: -6.4MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. * Witness Printer took 3.90ms. Allocated memory is still 92.3MB. Free memory is still 47.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 62 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1062 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1062 mSDsluCounter, 1959 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1152 mSDsCounter, 84 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 311 IncrementalHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 84 mSolverCounterUnsat, 807 mSDtfsCounter, 311 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=7, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 651 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 351 SizeOfPredicates, 11 NumberOfNonLiveVariables, 391 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 0/18 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 could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:43:03,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0db23be-c34a-46f5-a95c-3edd91ca0597/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample