./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF --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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:26:22,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:26:22,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:26:22,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:26:22,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:26:22,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:26:22,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:26:22,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:26:22,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:26:22,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:26:22,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:26:22,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:26:22,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:26:22,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:26:22,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:26:22,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:26:22,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:26:22,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:26:22,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:26:22,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:26:22,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:26:22,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:26:22,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:26:22,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:26:22,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:26:22,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:26:22,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:26:22,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:26:22,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:26:22,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:26:22,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:26:22,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:26:22,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:26:22,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:26:22,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:26:22,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:26:22,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:26:22,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:26:22,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:26:22,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:26:22,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:26:22,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-13 02:26:22,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:26:22,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:26:22,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:26:22,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:26:22,575 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:26:22,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:26:22,576 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:26:22,576 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:26:22,576 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:26:22,576 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:26:22,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:26:22,578 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:26:22,578 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:26:22,578 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:26:22,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:26:22,579 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:26:22,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 02:26:22,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 02:26:22,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:26:22,580 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:26:22,580 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 02:26:22,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:26:22,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:26:22,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:26:22,581 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 02:26:22,581 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 02:26:22,582 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 02:26:22,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:26:22,582 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:26:22,582 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:26:22,582 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:26:22,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:26:22,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:26:22,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:22,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:26:22,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:26:22,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:26:22,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:26:22,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:26:22,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:26:22,585 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_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-11-13 02:26:22,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:26:22,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:26:22,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:26:22,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:26:22,879 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:26:22,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-11-13 02:26:22,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/data/0e18fdfca/d26231c6d8b4446494409daeb1dc9b7f/FLAGa5e1428d3 [2021-11-13 02:26:23,367 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:26:23,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-11-13 02:26:23,380 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/data/0e18fdfca/d26231c6d8b4446494409daeb1dc9b7f/FLAGa5e1428d3 [2021-11-13 02:26:23,779 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/data/0e18fdfca/d26231c6d8b4446494409daeb1dc9b7f [2021-11-13 02:26:23,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:26:23,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:26:23,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:23,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:26:23,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:26:23,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:23" (1/1) ... [2021-11-13 02:26:23,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60efa62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:23, skipping insertion in model container [2021-11-13 02:26:23,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:23" (1/1) ... [2021-11-13 02:26:23,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:26:23,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:24,005 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-11-13 02:26:24,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:24,030 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:26:24,041 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-11-13 02:26:24,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:24,062 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:26:24,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24 WrapperNode [2021-11-13 02:26:24,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:24,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:24,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:26:24,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:26:24,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:24,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:26:24,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:26:24,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:26:24,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:26:24,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:26:24,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:26:24,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:26:24,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (1/1) ... [2021-11-13 02:26:24,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:24,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:24,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:26:24,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:26:24,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:26:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:26:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:26:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-13 02:26:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-13 02:26:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:26:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:26:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:26:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:26:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 02:26:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:26:24,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:26:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:26:24,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:26:24,652 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:26:24,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:26:24 BoogieIcfgContainer [2021-11-13 02:26:24,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:26:24,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:26:24,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:26:24,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:26:24,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:26:23" (1/3) ... [2021-11-13 02:26:24,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12020669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:26:24, skipping insertion in model container [2021-11-13 02:26:24,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24" (2/3) ... [2021-11-13 02:26:24,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12020669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:26:24, skipping insertion in model container [2021-11-13 02:26:24,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:26:24" (3/3) ... [2021-11-13 02:26:24,663 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-11-13 02:26:24,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:26:24,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-13 02:26:24,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:26:24,719 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 [2021-11-13 02:26:24,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-13 02:26:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 02:26:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:26:24,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:24,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:24,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash -968354357, now seen corresponding path program 1 times [2021-11-13 02:26:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:24,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644749237] [2021-11-13 02:26:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:24,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:25,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:25,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644749237] [2021-11-13 02:26:25,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644749237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:25,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:25,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:26:25,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900407372] [2021-11-13 02:26:25,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:25,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:26:25,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:25,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:26:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:26:25,058 INFO L87 Difference]: Start difference. First operand has 45 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:26:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:25,267 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-11-13 02:26:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:26:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-13 02:26:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:25,280 INFO L225 Difference]: With dead ends: 74 [2021-11-13 02:26:25,282 INFO L226 Difference]: Without dead ends: 73 [2021-11-13 02:26:25,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:26:25,291 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.36ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.28ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:25,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 166 Invalid, 91 Unknown, 0 Unchecked, 14.36ms Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 118.28ms Time] [2021-11-13 02:26:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-13 02:26:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-11-13 02:26:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 47 states have internal predecessors, (57), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-13 02:26:25,354 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 12 [2021-11-13 02:26:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:25,354 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-13 02:26:25,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:26:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-13 02:26:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:26:25,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:25,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:25,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:26:25,357 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash -969714010, now seen corresponding path program 1 times [2021-11-13 02:26:25,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:25,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955641245] [2021-11-13 02:26:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:25,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:25,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:25,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955641245] [2021-11-13 02:26:25,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955641245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:25,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:25,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:26:25,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881898231] [2021-11-13 02:26:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:25,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:26:25,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:25,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:26:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:26:25,427 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:25,457 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2021-11-13 02:26:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:26:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2021-11-13 02:26:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:25,460 INFO L225 Difference]: With dead ends: 62 [2021-11-13 02:26:25,460 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 02:26:25,460 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 [2021-11-13 02:26:25,462 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.40ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:25,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 12 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 24.40ms Time] [2021-11-13 02:26:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 02:26:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-13 02:26:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.6) internal successors, (56), 46 states have internal predecessors, (56), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-13 02:26:25,474 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 12 [2021-11-13 02:26:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:25,474 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-13 02:26:25,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-13 02:26:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 02:26:25,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:25,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:25,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:26:25,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 3636804, now seen corresponding path program 1 times [2021-11-13 02:26:25,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:25,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325073488] [2021-11-13 02:26:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:25,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:25,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:25,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325073488] [2021-11-13 02:26:25,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325073488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:25,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:25,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:26:25,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340769159] [2021-11-13 02:26:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:25,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:26:25,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:26:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:26:25,571 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:25,605 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-11-13 02:26:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:26:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-13 02:26:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:25,610 INFO L225 Difference]: With dead ends: 61 [2021-11-13 02:26:25,610 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 02:26:25,611 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 [2021-11-13 02:26:25,614 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.08ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:25,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 15 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 23.08ms Time] [2021-11-13 02:26:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 02:26:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-13 02:26:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-11-13 02:26:25,632 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 13 [2021-11-13 02:26:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:25,633 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-11-13 02:26:25,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-11-13 02:26:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 02:26:25,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:25,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:25,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:26:25,635 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 112740968, now seen corresponding path program 1 times [2021-11-13 02:26:25,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:25,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085649343] [2021-11-13 02:26:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:25,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:25,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:25,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085649343] [2021-11-13 02:26:25,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085649343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:25,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:25,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:26:25,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671189443] [2021-11-13 02:26:25,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:25,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:26:25,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:26:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:26:25,708 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:25,757 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-11-13 02:26:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:26:25,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-11-13 02:26:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:25,759 INFO L225 Difference]: With dead ends: 60 [2021-11-13 02:26:25,760 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 02:26:25,760 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 [2021-11-13 02:26:25,764 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:25,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 21 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 40.72ms Time] [2021-11-13 02:26:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 02:26:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-13 02:26:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.542857142857143) internal successors, (54), 44 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-11-13 02:26:25,784 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 14 [2021-11-13 02:26:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:25,785 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-11-13 02:26:25,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-11-13 02:26:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 02:26:25,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:25,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:25,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:26:25,787 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1054594017, now seen corresponding path program 1 times [2021-11-13 02:26:25,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:25,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466466550] [2021-11-13 02:26:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:25,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:25,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:25,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466466550] [2021-11-13 02:26:25,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466466550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:25,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:25,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:26:25,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985132222] [2021-11-13 02:26:25,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:25,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:26:25,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:26:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:26:25,879 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:25,978 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-11-13 02:26:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:26:25,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-13 02:26:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:25,981 INFO L225 Difference]: With dead ends: 56 [2021-11-13 02:26:25,981 INFO L226 Difference]: Without dead ends: 56 [2021-11-13 02:26:25,986 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 [2021-11-13 02:26:25,987 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.67ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:25,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 55 Invalid, 71 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 73.67ms Time] [2021-11-13 02:26:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-13 02:26:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-13 02:26:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-13 02:26:26,008 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 15 [2021-11-13 02:26:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:26,010 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-13 02:26:26,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-13 02:26:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 02:26:26,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:26,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:26,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:26:26,011 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1054594018, now seen corresponding path program 1 times [2021-11-13 02:26:26,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:26,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453627858] [2021-11-13 02:26:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:26,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:26,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:26,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453627858] [2021-11-13 02:26:26,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453627858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:26,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:26,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:26:26,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919851747] [2021-11-13 02:26:26,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:26,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:26:26,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:26:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:26:26,154 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:26,327 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-11-13 02:26:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:26:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-13 02:26:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:26,329 INFO L225 Difference]: With dead ends: 61 [2021-11-13 02:26:26,329 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 02:26:26,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:26:26,330 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.71ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:26,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 92 Invalid, 118 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 123.71ms Time] [2021-11-13 02:26:26,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 02:26:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-11-13 02:26:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-11-13 02:26:26,337 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 15 [2021-11-13 02:26:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:26,338 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-11-13 02:26:26,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-11-13 02:26:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 02:26:26,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:26,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:26,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:26:26,339 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash -799997241, now seen corresponding path program 1 times [2021-11-13 02:26:26,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:26,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23729014] [2021-11-13 02:26:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:26,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:26,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:26,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23729014] [2021-11-13 02:26:26,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23729014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:26,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:26,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:26:26,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612938518] [2021-11-13 02:26:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:26,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:26:26,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:26:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:26:26,411 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:26,444 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-11-13 02:26:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:26:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-13 02:26:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:26,445 INFO L225 Difference]: With dead ends: 55 [2021-11-13 02:26:26,445 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 02:26:26,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:26:26,446 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.76ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:26,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 28 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 23.76ms Time] [2021-11-13 02:26:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 02:26:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-13 02:26:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 02:26:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-13 02:26:26,452 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 15 [2021-11-13 02:26:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:26,452 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-13 02:26:26,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-13 02:26:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 02:26:26,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:26,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:26,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:26:26,454 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1667323833, now seen corresponding path program 1 times [2021-11-13 02:26:26,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:26,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450295240] [2021-11-13 02:26:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:26,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:26,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450295240] [2021-11-13 02:26:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450295240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:26,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:26,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:26:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633952547] [2021-11-13 02:26:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:26,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:26:26,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:26:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:26:26,597 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:26,728 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-13 02:26:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:26:26,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-13 02:26:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:26,732 INFO L225 Difference]: With dead ends: 49 [2021-11-13 02:26:26,732 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 02:26:26,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:26:26,735 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:26,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 99 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 89.53ms Time] [2021-11-13 02:26:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 02:26:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-11-13 02:26:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 02:26:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-13 02:26:26,748 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-11-13 02:26:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:26,749 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-13 02:26:26,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-13 02:26:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 02:26:26,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:26,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:26,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:26:26,752 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 680049768, now seen corresponding path program 1 times [2021-11-13 02:26:26,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:26,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004296789] [2021-11-13 02:26:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:26,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:26,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:26,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004296789] [2021-11-13 02:26:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004296789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:26:26,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746325258] [2021-11-13 02:26:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:26,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:26,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:26,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:26,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:26:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:27,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 02:26:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:27,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 02:26:29,234 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1))) is different from true [2021-11-13 02:26:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2021-11-13 02:26:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-13 02:26:29,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746325258] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:26:30,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:26:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11] total 21 [2021-11-13 02:26:30,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963200057] [2021-11-13 02:26:30,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:30,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:26:30,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:26:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=316, Unknown=1, NotChecked=36, Total=420 [2021-11-13 02:26:30,495 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:30,613 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-11-13 02:26:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:26:30,616 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-13 02:26:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:30,617 INFO L225 Difference]: With dead ends: 51 [2021-11-13 02:26:30,617 INFO L226 Difference]: Without dead ends: 51 [2021-11-13 02:26:30,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=80, Invalid=385, Unknown=1, NotChecked=40, Total=506 [2021-11-13 02:26:30,618 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 78.11ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:30,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 83 Invalid, 94 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [16 Valid, 65 Invalid, 0 Unknown, 13 Unchecked, 78.11ms Time] [2021-11-13 02:26:30,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-13 02:26:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-13 02:26:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 02:26:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-13 02:26:30,630 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 23 [2021-11-13 02:26:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:30,632 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-13 02:26:30,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:26:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-13 02:26:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 02:26:30,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:30,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:30,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:30,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:30,862 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1696136072, now seen corresponding path program 1 times [2021-11-13 02:26:30,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:30,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920819070] [2021-11-13 02:26:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:30,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:26:31,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:31,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920819070] [2021-11-13 02:26:31,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920819070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:26:31,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047504627] [2021-11-13 02:26:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:31,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:31,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:31,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:26:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:31,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:26:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:26:31,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:31,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-13 02:26:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:26:31,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047504627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:31,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710684466] [2021-11-13 02:26:31,991 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-13 02:26:31,991 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:26:31,998 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:26:32,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:26:32,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-11-13 02:26:32,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650402249] [2021-11-13 02:26:32,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:26:32,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:26:32,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:26:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:26:32,004 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-13 02:26:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:32,438 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-13 02:26:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 02:26:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 26 [2021-11-13 02:26:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:32,443 INFO L225 Difference]: With dead ends: 53 [2021-11-13 02:26:32,444 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 02:26:32,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-11-13 02:26:32,445 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.48ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 227.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:32,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 196 Invalid, 302 Unknown, 0 Unchecked, 5.48ms Time], IncrementalHoareTripleChecker [23 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 227.72ms Time] [2021-11-13 02:26:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 02:26:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-13 02:26:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 02:26:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-11-13 02:26:32,451 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 26 [2021-11-13 02:26:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:32,452 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-11-13 02:26:32,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-13 02:26:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-11-13 02:26:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 02:26:32,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:32,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:32,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:32,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 02:26:32,671 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 5819429, now seen corresponding path program 1 times [2021-11-13 02:26:32,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:32,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418358973] [2021-11-13 02:26:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:32,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:26:32,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:32,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418358973] [2021-11-13 02:26:32,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418358973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:26:32,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793802253] [2021-11-13 02:26:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:32,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:32,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:32,899 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:32,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:26:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:32,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 02:26:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:33,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 02:26:35,108 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_7 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_7))) is different from true [2021-11-13 02:26:35,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2021-11-13 02:26:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-13 02:26:35,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2021-11-13 02:26:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:26:37,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793802253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:37,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1684101573] [2021-11-13 02:26:37,202 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 02:26:37,202 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:26:37,202 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:26:37,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:26:37,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2021-11-13 02:26:37,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297099733] [2021-11-13 02:26:37,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:26:37,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 02:26:37,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:37,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 02:26:37,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=505, Unknown=1, NotChecked=46, Total=650 [2021-11-13 02:26:37,205 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 26 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 13 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 02:26:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:37,919 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-11-13 02:26:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 02:26:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 13 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2021-11-13 02:26:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:37,921 INFO L225 Difference]: With dead ends: 74 [2021-11-13 02:26:37,921 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 02:26:37,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=203, Invalid=922, Unknown=1, NotChecked=64, Total=1190 [2021-11-13 02:26:37,923 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 242.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.53ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 289.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:37,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 318 Invalid, 561 Unknown, 0 Unchecked, 6.53ms Time], IncrementalHoareTripleChecker [6 Valid, 337 Invalid, 0 Unknown, 218 Unchecked, 289.41ms Time] [2021-11-13 02:26:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 02:26:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-11-13 02:26:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 47 states have internal predecessors, (52), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:26:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-11-13 02:26:37,938 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 26 [2021-11-13 02:26:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:37,938 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-11-13 02:26:37,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 13 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 02:26:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-11-13 02:26:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 02:26:37,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:37,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:37,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:38,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 02:26:38,166 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:38,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1040609633, now seen corresponding path program 1 times [2021-11-13 02:26:38,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:38,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889414981] [2021-11-13 02:26:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:38,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:26:38,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:38,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889414981] [2021-11-13 02:26:38,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889414981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:26:38,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132834232] [2021-11-13 02:26:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:38,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:38,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:38,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:38,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:26:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 02:26:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:38,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 02:26:40,641 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_12 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_12))) is different from true [2021-11-13 02:26:40,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2021-11-13 02:26:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:41,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:41,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2021-11-13 02:26:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:26:42,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132834232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:42,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109459971] [2021-11-13 02:26:42,456 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-13 02:26:42,456 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:26:42,457 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:26:42,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:26:42,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 33 [2021-11-13 02:26:42,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019033092] [2021-11-13 02:26:42,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:26:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 02:26:42,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 02:26:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=952, Unknown=1, NotChecked=62, Total=1122 [2021-11-13 02:26:42,462 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:43,336 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-11-13 02:26:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 02:26:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 27 [2021-11-13 02:26:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:43,338 INFO L225 Difference]: With dead ends: 96 [2021-11-13 02:26:43,339 INFO L226 Difference]: Without dead ends: 96 [2021-11-13 02:26:43,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=222, Invalid=1761, Unknown=1, NotChecked=86, Total=2070 [2021-11-13 02:26:43,341 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 296.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:43,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 223 Invalid, 669 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [36 Valid, 364 Invalid, 0 Unknown, 269 Unchecked, 296.70ms Time] [2021-11-13 02:26:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-13 02:26:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2021-11-13 02:26:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2021-11-13 02:26:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-11-13 02:26:43,349 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 27 [2021-11-13 02:26:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:43,349 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-11-13 02:26:43,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:26:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-11-13 02:26:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 02:26:43,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:43,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:43,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:43,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:43,582 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash 180402276, now seen corresponding path program 1 times [2021-11-13 02:26:43,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:43,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245899108] [2021-11-13 02:26:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:43,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:26:43,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:43,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245899108] [2021-11-13 02:26:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245899108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:26:43,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024834] [2021-11-13 02:26:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:43,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:43,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:43,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:26:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 02:26:43,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:26:44,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:44,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2021-11-13 02:26:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:26:44,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:44,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864191012] [2021-11-13 02:26:44,834 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 02:26:44,834 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:26:44,835 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:26:44,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:26:44,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2021-11-13 02:26:44,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092592168] [2021-11-13 02:26:44,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:26:44,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 02:26:44,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:44,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 02:26:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:26:44,839 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 26 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 11 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 02:26:46,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:46,048 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-11-13 02:26:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:26:46,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 11 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 27 [2021-11-13 02:26:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:46,049 INFO L225 Difference]: With dead ends: 87 [2021-11-13 02:26:46,049 INFO L226 Difference]: Without dead ends: 87 [2021-11-13 02:26:46,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 02:26:46,051 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 209 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 417.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.15ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 516.35ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:46,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 209 Invalid, 706 Unknown, 0 Unchecked, 8.15ms Time], IncrementalHoareTripleChecker [125 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 516.35ms Time] [2021-11-13 02:26:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-13 02:26:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-13 02:26:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2021-11-13 02:26:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2021-11-13 02:26:46,059 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 27 [2021-11-13 02:26:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:46,060 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2021-11-13 02:26:46,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 11 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 02:26:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2021-11-13 02:26:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 02:26:46,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:46,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:46,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:46,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 02:26:46,282 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:46,283 INFO L85 PathProgramCache]: Analyzing trace with hash -119215993, now seen corresponding path program 1 times [2021-11-13 02:26:46,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:46,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051660294] [2021-11-13 02:26:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:46,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:26:46,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:26:46,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051660294] [2021-11-13 02:26:46,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051660294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:26:46,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094050981] [2021-11-13 02:26:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:46,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:46,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:46,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:26:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:26:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:46,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 02:26:48,489 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_21 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_21))) is different from true [2021-11-13 02:26:50,539 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_22 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_22))) is different from true [2021-11-13 02:26:52,574 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_23 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_23))) is different from true [2021-11-13 02:26:52,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-13 02:26:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-13 02:26:52,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:26:58,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094050981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:58,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059953511] [2021-11-13 02:26:58,964 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-13 02:26:58,964 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:26:58,965 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:26:58,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:26:58,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 22 [2021-11-13 02:26:58,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640179060] [2021-11-13 02:26:58,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:26:58,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 02:26:58,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:26:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 02:26:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=295, Unknown=5, NotChecked=108, Total=462 [2021-11-13 02:26:58,968 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 9 states have call successors, (15), 8 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-13 02:26:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:59,178 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-11-13 02:26:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:26:59,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 9 states have call successors, (15), 8 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2021-11-13 02:26:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:59,180 INFO L225 Difference]: With dead ends: 85 [2021-11-13 02:26:59,180 INFO L226 Difference]: Without dead ends: 78 [2021-11-13 02:26:59,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=87, Invalid=426, Unknown=5, NotChecked=132, Total=650 [2021-11-13 02:26:59,181 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 118.18ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:59,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 144 Invalid, 343 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [9 Valid, 130 Invalid, 0 Unknown, 204 Unchecked, 118.18ms Time] [2021-11-13 02:26:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-13 02:26:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-13 02:26:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-13 02:26:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-11-13 02:26:59,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 31 [2021-11-13 02:26:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:59,189 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-11-13 02:26:59,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 9 states have call successors, (15), 8 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-13 02:26:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-11-13 02:26:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 02:26:59,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:59,192 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:59,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:59,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 02:26:59,414 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-13 02:26:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 842353375, now seen corresponding path program 1 times [2021-11-13 02:26:59,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:26:59,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385616479] [2021-11-13 02:26:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:59,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:26:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:27:00,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:00,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385616479] [2021-11-13 02:27:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385616479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:00,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678902183] [2021-11-13 02:27:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:00,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:00,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:00,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:00,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 02:27:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:00,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:27:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:27:00,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:00,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:00,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2021-11-13 02:27:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:27:01,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678902183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:27:01,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507951679] [2021-11-13 02:27:01,083 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-13 02:27:01,083 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:27:01,083 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:27:01,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:27:01,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 6] total 25 [2021-11-13 02:27:01,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844073087] [2021-11-13 02:27:01,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:27:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 02:27:01,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 02:27:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:27:01,086 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 13 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-13 02:27:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:04,286 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-13 02:27:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 02:27:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 13 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) Word has length 52 [2021-11-13 02:27:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:04,288 INFO L225 Difference]: With dead ends: 79 [2021-11-13 02:27:04,289 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 02:27:04,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=261, Invalid=1718, Unknown=1, NotChecked=0, Total=1980 [2021-11-13 02:27:04,291 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.91ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 291.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:04,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 258 Invalid, 504 Unknown, 0 Unchecked, 3.91ms Time], IncrementalHoareTripleChecker [31 Valid, 429 Invalid, 0 Unknown, 44 Unchecked, 291.00ms Time] [2021-11-13 02:27:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 02:27:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 02:27:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-13 02:27:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 02:27:04,293 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2021-11-13 02:27:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:04,293 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 02:27:04,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 13 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-13 02:27:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 02:27:04,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 02:27:04,295 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (12 of 13 remaining) [2021-11-13 02:27:04,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (11 of 13 remaining) [2021-11-13 02:27:04,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (10 of 13 remaining) [2021-11-13 02:27:04,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2021-11-13 02:27:04,297 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION (8 of 13 remaining) [2021-11-13 02:27:04,297 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION (7 of 13 remaining) [2021-11-13 02:27:04,297 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION (6 of 13 remaining) [2021-11-13 02:27:04,297 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION (5 of 13 remaining) [2021-11-13 02:27:04,297 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION (4 of 13 remaining) [2021-11-13 02:27:04,298 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION (3 of 13 remaining) [2021-11-13 02:27:04,298 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION (2 of 13 remaining) [2021-11-13 02:27:04,298 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION (1 of 13 remaining) [2021-11-13 02:27:04,298 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2021-11-13 02:27:04,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:27:04,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 02:27:04,509 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:04,510 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 02:27:04,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 02:27:04 BoogieIcfgContainer [2021-11-13 02:27:04,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 02:27:04,514 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 02:27:04,514 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 02:27:04,514 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 02:27:04,514 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:26:24" (3/4) ... [2021-11-13 02:27:04,517 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 02:27:04,523 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-13 02:27:04,524 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-11-13 02:27:04,524 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-13 02:27:04,530 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2021-11-13 02:27:04,530 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-13 02:27:04,530 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-13 02:27:04,531 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 02:27:04,584 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-13 02:27:04,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 02:27:04,585 INFO L158 Benchmark]: Toolchain (without parser) took 40799.01ms. Allocated memory was 100.7MB in the beginning and 188.7MB in the end (delta: 88.1MB). Free memory was 60.7MB in the beginning and 141.2MB in the end (delta: -80.5MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2021-11-13 02:27:04,585 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:27:04,589 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.40ms. Allocated memory is still 100.7MB. Free memory was 60.5MB in the beginning and 76.9MB in the end (delta: -16.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-13 02:27:04,590 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.60ms. Allocated memory is still 100.7MB. Free memory was 76.9MB in the beginning and 75.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:27:04,590 INFO L158 Benchmark]: Boogie Preprocessor took 23.77ms. Allocated memory is still 100.7MB. Free memory was 75.2MB in the beginning and 74.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:27:04,591 INFO L158 Benchmark]: RCFGBuilder took 533.09ms. Allocated memory is still 100.7MB. Free memory was 74.0MB in the beginning and 59.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 02:27:04,591 INFO L158 Benchmark]: TraceAbstraction took 39857.08ms. Allocated memory was 100.7MB in the beginning and 188.7MB in the end (delta: 88.1MB). Free memory was 59.3MB in the beginning and 145.2MB in the end (delta: -85.9MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-13 02:27:04,594 INFO L158 Benchmark]: Witness Printer took 70.48ms. Allocated memory is still 188.7MB. Free memory was 145.2MB in the beginning and 141.2MB in the end (delta: 4.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:27:04,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.40ms. Allocated memory is still 100.7MB. Free memory was 60.5MB in the beginning and 76.9MB in the end (delta: -16.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.60ms. Allocated memory is still 100.7MB. Free memory was 76.9MB in the beginning and 75.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.77ms. Allocated memory is still 100.7MB. Free memory was 75.2MB in the beginning and 74.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 533.09ms. Allocated memory is still 100.7MB. Free memory was 74.0MB in the beginning and 59.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 39857.08ms. Allocated memory was 100.7MB in the beginning and 188.7MB in the end (delta: 88.1MB). Free memory was 59.3MB in the beginning and 145.2MB in the end (delta: -85.9MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Witness Printer took 70.48ms. Allocated memory is still 188.7MB. Free memory was 145.2MB in the beginning and 141.2MB in the end (delta: 4.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 45 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 39.8s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 658 SdHoareTripleChecker+Valid, 2334.63ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 644 mSDsluCounter, 2110 SdHoareTripleChecker+Invalid, 1926.98ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 748 IncrementalHoareTripleChecker+Unchecked, 1945 mSDsCounter, 270 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2616 IncrementalHoareTripleChecker+Invalid, 3634 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 270 mSolverCounterUnsat, 399 mSDtfsCounter, 2616 mSolverCounterSat, 62.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 614 GetRequests, 335 SyntacticMatches, 21 SemanticMatches, 258 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 26.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=12, InterpolantAutomatonStates: 155, 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, 15 MinimizatonAttempts, 38 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 29.1s InterpolantComputationTime, 536 NumberOfCodeBlocks, 536 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 719 ConstructedInterpolants, 70 QuantifiedInterpolants, 6313 SizeOfPredicates, 95 NumberOfNonLiveVariables, 1197 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 131/219 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 - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-13 02:27:04,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a8d69d0-34f8-44fc-bebd-8cbe6699396b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE