./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI --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 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:20:57,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:20:57,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:20:57,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:20:57,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:20:57,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:20:57,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:20:57,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:20:57,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:20:57,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:20:57,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:20:57,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:20:57,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:20:57,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:20:57,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:20:57,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:20:57,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:20:57,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:20:57,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:20:57,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:20:57,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:20:57,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:20:57,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:20:57,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:20:57,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:20:57,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:20:57,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:20:57,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:20:57,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:20:57,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:20:57,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:20:57,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:20:57,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:20:57,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:20:57,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:20:57,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:20:57,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:20:57,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:20:57,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:20:57,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:20:57,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:20:57,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:20:57,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:20:57,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:20:57,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:20:57,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:20:57,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:20:57,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:20:57,497 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:20:57,497 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:20:57,498 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:20:57,498 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:20:57,499 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:20:57,499 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:20:57,499 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:20:57,499 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:20:57,500 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:20:57,500 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:20:57,500 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:20:57,500 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:20:57,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:20:57,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:20:57,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:20:57,502 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:20:57,502 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:20:57,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:20:57,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:20:57,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:20:57,503 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:20:57,503 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:20:57,503 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:20:57,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:20:57,504 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:20:57,504 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:20:57,504 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:20:57,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:20:57,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:20:57,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:20:57,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:20:57,507 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:20:57,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:20:57,507 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:20:57,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:20:57,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:20:57,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2022-11-03 02:20:57,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:20:57,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:20:57,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:20:57,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:20:57,825 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:20:57,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2022-11-03 02:20:57,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/ae44fa5b9/5e88db7fde6b44b9ba1d25c226fff8c0/FLAG95563899a [2022-11-03 02:20:58,447 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:20:58,448 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/sv-benchmarks/c/memsafety/lockfree-3.3.i [2022-11-03 02:20:58,464 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/ae44fa5b9/5e88db7fde6b44b9ba1d25c226fff8c0/FLAG95563899a [2022-11-03 02:20:58,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/ae44fa5b9/5e88db7fde6b44b9ba1d25c226fff8c0 [2022-11-03 02:20:58,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:20:58,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:20:58,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:20:58,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:20:58,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:20:58,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:20:58" (1/1) ... [2022-11-03 02:20:58,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115decc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:58, skipping insertion in model container [2022-11-03 02:20:58,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:20:58" (1/1) ... [2022-11-03 02:20:58,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:20:58,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:20:59,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:20:59,288 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:20:59,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:20:59,391 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:20:59,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59 WrapperNode [2022-11-03 02:20:59,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:20:59,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:20:59,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:20:59,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:20:59,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,476 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-11-03 02:20:59,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:20:59,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:20:59,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:20:59,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:20:59,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,526 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:20:59,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:20:59,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:20:59,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:20:59,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (1/1) ... [2022-11-03 02:20:59,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:20:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:59,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:20:59,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:20:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:20:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:20:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:20:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:20:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:20:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:20:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:20:59,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:20:59,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:20:59,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:20:59,789 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:20:59,791 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:21:00,134 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:21:00,198 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:21:00,198 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:21:00,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:21:00 BoogieIcfgContainer [2022-11-03 02:21:00,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:21:00,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:21:00,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:21:00,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:21:00,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:20:58" (1/3) ... [2022-11-03 02:21:00,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6684b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:21:00, skipping insertion in model container [2022-11-03 02:21:00,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:20:59" (2/3) ... [2022-11-03 02:21:00,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6684b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:21:00, skipping insertion in model container [2022-11-03 02:21:00,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:21:00" (3/3) ... [2022-11-03 02:21:00,220 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2022-11-03 02:21:00,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:21:00,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-03 02:21:00,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:21:00,291 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5859cc52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:21:00,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-03 02:21:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:21:00,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:00,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:21:00,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash 5940810, now seen corresponding path program 1 times [2022-11-03 02:21:00,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:00,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69727737] [2022-11-03 02:21:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:00,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:00,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69727737] [2022-11-03 02:21:00,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69727737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:00,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:00,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100478676] [2022-11-03 02:21:00,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:00,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:21:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:21:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:21:00,561 INFO L87 Difference]: Start difference. First operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:00,629 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-11-03 02:21:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:21:00,633 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 02:21:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:00,643 INFO L225 Difference]: With dead ends: 49 [2022-11-03 02:21:00,643 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:21:00,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:21:00,650 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:00,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:21:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-03 02:21:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 2.107142857142857) internal successors, (59), 47 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-11-03 02:21:00,693 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 4 [2022-11-03 02:21:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:00,693 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-11-03 02:21:00,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-11-03 02:21:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:21:00,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:00,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:21:00,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:21:00,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash 185350861, now seen corresponding path program 1 times [2022-11-03 02:21:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:00,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779336666] [2022-11-03 02:21:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:00,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779336666] [2022-11-03 02:21:00,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779336666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:00,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:00,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:21:00,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973680390] [2022-11-03 02:21:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:00,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:00,821 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:00,967 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-11-03 02:21:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:21:00,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:00,972 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:21:00,972 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 02:21:00,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:00,980 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:00,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 02:21:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2022-11-03 02:21:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 67 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2022-11-03 02:21:01,001 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 5 [2022-11-03 02:21:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:01,001 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2022-11-03 02:21:01,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2022-11-03 02:21:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:21:01,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:01,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:21:01,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:21:01,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:01,012 INFO L85 PathProgramCache]: Analyzing trace with hash 185349669, now seen corresponding path program 1 times [2022-11-03 02:21:01,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:01,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924518348] [2022-11-03 02:21:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:01,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:01,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:01,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924518348] [2022-11-03 02:21:01,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924518348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:01,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:01,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239815776] [2022-11-03 02:21:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:01,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:01,108 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:01,172 INFO L93 Difference]: Finished difference Result 124 states and 187 transitions. [2022-11-03 02:21:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:01,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:21:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:01,174 INFO L225 Difference]: With dead ends: 124 [2022-11-03 02:21:01,174 INFO L226 Difference]: Without dead ends: 123 [2022-11-03 02:21:01,175 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:21:01,176 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:01,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-03 02:21:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2022-11-03 02:21:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 104 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 174 transitions. [2022-11-03 02:21:01,186 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 174 transitions. Word has length 5 [2022-11-03 02:21:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:01,186 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 174 transitions. [2022-11-03 02:21:01,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 174 transitions. [2022-11-03 02:21:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:21:01,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:01,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:21:01,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:21:01,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1450814034, now seen corresponding path program 1 times [2022-11-03 02:21:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:01,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399335354] [2022-11-03 02:21:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:01,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:01,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399335354] [2022-11-03 02:21:01,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399335354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:01,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:01,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:01,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802222923] [2022-11-03 02:21:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:01,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:01,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:01,285 INFO L87 Difference]: Start difference. First operand 105 states and 174 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:01,373 INFO L93 Difference]: Finished difference Result 158 states and 247 transitions. [2022-11-03 02:21:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 02:21:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:01,375 INFO L225 Difference]: With dead ends: 158 [2022-11-03 02:21:01,376 INFO L226 Difference]: Without dead ends: 158 [2022-11-03 02:21:01,376 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:21:01,377 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:01,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-03 02:21:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2022-11-03 02:21:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 121 states have (on average 1.9421487603305785) internal successors, (235), 138 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 235 transitions. [2022-11-03 02:21:01,389 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 235 transitions. Word has length 6 [2022-11-03 02:21:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:01,389 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 235 transitions. [2022-11-03 02:21:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 235 transitions. [2022-11-03 02:21:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:21:01,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:01,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:21:01,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:21:01,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1450814035, now seen corresponding path program 1 times [2022-11-03 02:21:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:01,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286797163] [2022-11-03 02:21:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:01,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:01,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:01,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286797163] [2022-11-03 02:21:01,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286797163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:01,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:01,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:01,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851790698] [2022-11-03 02:21:01,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:01,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:01,522 INFO L87 Difference]: Start difference. First operand 139 states and 235 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:01,597 INFO L93 Difference]: Finished difference Result 153 states and 238 transitions. [2022-11-03 02:21:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 02:21:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:01,605 INFO L225 Difference]: With dead ends: 153 [2022-11-03 02:21:01,605 INFO L226 Difference]: Without dead ends: 153 [2022-11-03 02:21:01,605 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:21:01,607 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:01,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-03 02:21:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2022-11-03 02:21:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.8760330578512396) internal successors, (227), 136 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 227 transitions. [2022-11-03 02:21:01,617 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 227 transitions. Word has length 6 [2022-11-03 02:21:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:01,618 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 227 transitions. [2022-11-03 02:21:01,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 227 transitions. [2022-11-03 02:21:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:21:01,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:01,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:01,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:21:01,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2025570098, now seen corresponding path program 1 times [2022-11-03 02:21:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:01,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857387696] [2022-11-03 02:21:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:01,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:01,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:01,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857387696] [2022-11-03 02:21:01,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857387696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:01,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:01,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:21:01,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038408951] [2022-11-03 02:21:01,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:01,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:21:01,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:01,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:21:01,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:21:01,684 INFO L87 Difference]: Start difference. First operand 137 states and 227 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:01,801 INFO L93 Difference]: Finished difference Result 276 states and 414 transitions. [2022-11-03 02:21:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:21:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:21:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:01,804 INFO L225 Difference]: With dead ends: 276 [2022-11-03 02:21:01,804 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 02:21:01,804 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:21:01,805 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 112 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:01,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 296 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 02:21:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 167. [2022-11-03 02:21:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 151 states have (on average 1.8543046357615893) internal successors, (280), 166 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 280 transitions. [2022-11-03 02:21:01,819 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 280 transitions. Word has length 7 [2022-11-03 02:21:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:01,819 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 280 transitions. [2022-11-03 02:21:01,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 280 transitions. [2022-11-03 02:21:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:21:01,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:01,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:01,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:21:01,821 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1580480621, now seen corresponding path program 1 times [2022-11-03 02:21:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:01,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097331246] [2022-11-03 02:21:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:01,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097331246] [2022-11-03 02:21:01,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097331246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:01,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:01,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:21:01,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571112702] [2022-11-03 02:21:01,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:01,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:21:01,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:21:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:21:01,875 INFO L87 Difference]: Start difference. First operand 167 states and 280 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:01,949 INFO L93 Difference]: Finished difference Result 385 states and 587 transitions. [2022-11-03 02:21:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:21:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:21:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:01,951 INFO L225 Difference]: With dead ends: 385 [2022-11-03 02:21:01,952 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:21:01,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:21:01,956 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 86 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:01,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:21:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 257. [2022-11-03 02:21:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 241 states have (on average 1.7468879668049793) internal successors, (421), 256 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 421 transitions. [2022-11-03 02:21:01,978 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 421 transitions. Word has length 8 [2022-11-03 02:21:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:01,978 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 421 transitions. [2022-11-03 02:21:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 421 transitions. [2022-11-03 02:21:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:21:01,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:01,980 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:01,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:21:01,980 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1408785848, now seen corresponding path program 1 times [2022-11-03 02:21:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061345972] [2022-11-03 02:21:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:01,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:02,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:02,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061345972] [2022-11-03 02:21:02,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061345972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:02,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641832426] [2022-11-03 02:21:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:02,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:02,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:02,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:21:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:02,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:21:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:02,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:02,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641832426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:02,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211382694] [2022-11-03 02:21:02,500 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:21:02,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:02,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:02,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:02,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:02,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:21:02,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:02,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:21:02,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 02:21:02,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 02:21:02,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:21:02,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:21:02,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:02,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 02:21:03,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:03,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:21:03,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 02:21:03,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 02:21:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:03,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-03 02:21:03,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:21:03,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:21:03,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:03,740 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: NNF required for sound overapproximation. at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierOverapproximator.convert(QuantifierOverapproximator.java:59) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:158) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:86) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierOverapproximator.apply(QuantifierOverapproximator.java:85) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.Context.buildCriticalConstraintForConDis(Context.java:227) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.Context.buildCriticalConstraintForConDis(Context.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.Context.constructChildContextForConDis(Context.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.constructContextForApplicationTerm(QuantifierPushTermWalker.java:102) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.constructContextForApplicationTerm(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:167) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:21:03,744 INFO L158 Benchmark]: Toolchain (without parser) took 5023.65ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 65.6MB in the beginning and 67.4MB in the end (delta: -1.8MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. [2022-11-03 02:21:03,744 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:21:03,745 INFO L158 Benchmark]: CACSL2BoogieTranslator took 664.29ms. Allocated memory is still 102.8MB. Free memory was 65.4MB in the beginning and 71.4MB in the end (delta: -6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:21:03,745 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.65ms. Allocated memory is still 102.8MB. Free memory was 71.4MB in the beginning and 69.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:21:03,745 INFO L158 Benchmark]: Boogie Preprocessor took 62.79ms. Allocated memory is still 102.8MB. Free memory was 69.4MB in the beginning and 67.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:21:03,746 INFO L158 Benchmark]: RCFGBuilder took 669.82ms. Allocated memory is still 102.8MB. Free memory was 67.6MB in the beginning and 79.2MB in the end (delta: -11.6MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2022-11-03 02:21:03,746 INFO L158 Benchmark]: TraceAbstraction took 3531.06ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 78.7MB in the beginning and 67.4MB in the end (delta: 11.3MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2022-11-03 02:21:03,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 664.29ms. Allocated memory is still 102.8MB. Free memory was 65.4MB in the beginning and 71.4MB in the end (delta: -6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.65ms. Allocated memory is still 102.8MB. Free memory was 71.4MB in the beginning and 69.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.79ms. Allocated memory is still 102.8MB. Free memory was 69.4MB in the beginning and 67.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 669.82ms. Allocated memory is still 102.8MB. Free memory was 67.6MB in the beginning and 79.2MB in the end (delta: -11.6MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. * TraceAbstraction took 3531.06ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 78.7MB in the beginning and 67.4MB in the end (delta: 11.3MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: NNF required for sound overapproximation. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: NNF required for sound overapproximation.: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierOverapproximator.convert(QuantifierOverapproximator.java:59) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:21:03,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI --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 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:21:06,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:21:06,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:21:06,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:21:06,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:21:06,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:21:06,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:21:06,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:21:06,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:21:06,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:21:06,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:21:06,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:21:06,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:21:06,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:21:06,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:21:06,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:21:06,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:21:06,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:21:06,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:21:06,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:21:06,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:21:06,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:21:06,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:21:06,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:21:06,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:21:06,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:21:06,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:21:06,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:21:06,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:21:06,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:21:06,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:21:06,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:21:06,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:21:06,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:21:06,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:21:06,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:21:06,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:21:06,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:21:06,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:21:06,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:21:06,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:21:06,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-03 02:21:06,486 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:21:06,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:21:06,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:21:06,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:21:06,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:21:06,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:21:06,488 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:21:06,488 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:21:06,489 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:21:06,489 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:21:06,489 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:21:06,489 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:21:06,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:21:06,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:21:06,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:21:06,491 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:21:06,491 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:21:06,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:21:06,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:21:06,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:21:06,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:21:06,492 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:21:06,492 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:21:06,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:21:06,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:21:06,492 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:21:06,493 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:21:06,493 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:21:06,493 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:21:06,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:21:06,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:21:06,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:21:06,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:21:06,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:21:06,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:21:06,494 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:21:06,495 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:06,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:21:06,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:21:06,497 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2022-11-03 02:21:06,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:21:06,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:21:06,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:21:06,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:21:06,953 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:21:06,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2022-11-03 02:21:07,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/2d3597efa/1ea1f987a3b749ffab9cbcf7716ae26b/FLAGc76d41987 [2022-11-03 02:21:07,670 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:21:07,674 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/sv-benchmarks/c/memsafety/lockfree-3.3.i [2022-11-03 02:21:07,686 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/2d3597efa/1ea1f987a3b749ffab9cbcf7716ae26b/FLAGc76d41987 [2022-11-03 02:21:07,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/data/2d3597efa/1ea1f987a3b749ffab9cbcf7716ae26b [2022-11-03 02:21:07,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:21:07,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:21:07,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:21:07,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:21:07,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:21:07,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:21:07" (1/1) ... [2022-11-03 02:21:07,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175bd1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:07, skipping insertion in model container [2022-11-03 02:21:07,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:21:07" (1/1) ... [2022-11-03 02:21:07,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:21:08,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:21:08,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:21:08,430 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:21:08,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:21:08,535 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:21:08,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08 WrapperNode [2022-11-03 02:21:08,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:21:08,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:21:08,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:21:08,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:21:08,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,605 INFO L138 Inliner]: procedures = 128, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 119 [2022-11-03 02:21:08,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:21:08,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:21:08,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:21:08,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:21:08,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:21:08,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:21:08,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:21:08,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:21:08,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (1/1) ... [2022-11-03 02:21:08,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:21:08,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:08,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:21:08,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:21:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:21:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:21:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:21:08,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:21:08,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:21:08,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:21:08,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:21:08,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:21:08,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:21:08,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:21:08,954 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:21:08,956 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:21:09,413 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:21:09,420 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:21:09,424 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:21:09,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:21:09 BoogieIcfgContainer [2022-11-03 02:21:09,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:21:09,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:21:09,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:21:09,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:21:09,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:21:07" (1/3) ... [2022-11-03 02:21:09,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432064c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:21:09, skipping insertion in model container [2022-11-03 02:21:09,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:08" (2/3) ... [2022-11-03 02:21:09,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432064c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:21:09, skipping insertion in model container [2022-11-03 02:21:09,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:21:09" (3/3) ... [2022-11-03 02:21:09,438 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2022-11-03 02:21:09,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:21:09,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-03 02:21:09,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:21:09,555 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@342d83c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:21:09,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-03 02:21:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:21:09,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:09,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:21:09,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 28701640, now seen corresponding path program 1 times [2022-11-03 02:21:09,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:09,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884862768] [2022-11-03 02:21:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:09,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:09,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:09,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:09,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:21:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:21:09,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:09,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:09,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:09,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884862768] [2022-11-03 02:21:09,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884862768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:09,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:09,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:09,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773341500] [2022-11-03 02:21:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:09,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:09,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:09,879 INFO L87 Difference]: Start difference. First operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:09,964 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2022-11-03 02:21:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:09,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:21:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:09,980 INFO L225 Difference]: With dead ends: 107 [2022-11-03 02:21:09,980 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:21:09,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:09,987 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 63 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:09,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:21:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-11-03 02:21:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 86 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2022-11-03 02:21:10,038 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 5 [2022-11-03 02:21:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:10,039 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2022-11-03 02:21:10,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2022-11-03 02:21:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:21:10,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:10,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:21:10,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:21:10,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:10,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash 889749439, now seen corresponding path program 1 times [2022-11-03 02:21:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:10,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503729783] [2022-11-03 02:21:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:10,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:10,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:10,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:10,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:21:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:21:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:10,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:10,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503729783] [2022-11-03 02:21:10,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503729783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:10,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:10,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:10,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486129680] [2022-11-03 02:21:10,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:10,392 INFO L87 Difference]: Start difference. First operand 87 states and 129 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:10,564 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2022-11-03 02:21:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 02:21:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:10,567 INFO L225 Difference]: With dead ends: 163 [2022-11-03 02:21:10,568 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 02:21:10,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:10,570 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 62 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:10,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:21:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 02:21:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2022-11-03 02:21:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 120 states have (on average 1.9083333333333334) internal successors, (229), 139 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 229 transitions. [2022-11-03 02:21:10,589 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 229 transitions. Word has length 6 [2022-11-03 02:21:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:10,589 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 229 transitions. [2022-11-03 02:21:10,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 229 transitions. [2022-11-03 02:21:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:21:10,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:10,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:21:10,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:10,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:10,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2022-11-03 02:21:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:10,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780518010] [2022-11-03 02:21:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:10,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:10,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:10,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:10,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:21:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:21:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:10,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:21:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:10,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:10,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:10,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780518010] [2022-11-03 02:21:10,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780518010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:10,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:10,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946550719] [2022-11-03 02:21:10,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:10,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:10,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:10,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:10,987 INFO L87 Difference]: Start difference. First operand 140 states and 229 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:11,221 INFO L93 Difference]: Finished difference Result 211 states and 330 transitions. [2022-11-03 02:21:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:11,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 02:21:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:11,224 INFO L225 Difference]: With dead ends: 211 [2022-11-03 02:21:11,224 INFO L226 Difference]: Without dead ends: 211 [2022-11-03 02:21:11,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:11,225 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 64 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:11,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 163 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:21:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-03 02:21:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 190. [2022-11-03 02:21:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 172 states have (on average 1.8372093023255813) internal successors, (316), 189 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 316 transitions. [2022-11-03 02:21:11,255 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 316 transitions. Word has length 6 [2022-11-03 02:21:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:11,256 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 316 transitions. [2022-11-03 02:21:11,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 316 transitions. [2022-11-03 02:21:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:21:11,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:11,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:21:11,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:11,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:11,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2022-11-03 02:21:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:11,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558474559] [2022-11-03 02:21:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:11,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:11,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:11,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:11,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:21:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:11,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:21:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:11,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:11,586 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:11,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558474559] [2022-11-03 02:21:11,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558474559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:11,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:11,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:11,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139165587] [2022-11-03 02:21:11,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:11,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:11,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:11,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:11,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:11,590 INFO L87 Difference]: Start difference. First operand 190 states and 316 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:11,816 INFO L93 Difference]: Finished difference Result 206 states and 321 transitions. [2022-11-03 02:21:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:11,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 02:21:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:11,820 INFO L225 Difference]: With dead ends: 206 [2022-11-03 02:21:11,820 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 02:21:11,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:11,822 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 63 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:11,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 169 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:21:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 02:21:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2022-11-03 02:21:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 172 states have (on average 1.7906976744186047) internal successors, (308), 187 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 308 transitions. [2022-11-03 02:21:11,840 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 308 transitions. Word has length 6 [2022-11-03 02:21:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:11,840 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 308 transitions. [2022-11-03 02:21:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 308 transitions. [2022-11-03 02:21:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:21:11,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:11,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:11,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:12,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2022-11-03 02:21:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:12,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905871175] [2022-11-03 02:21:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:12,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:12,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:12,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:12,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:21:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:12,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:12,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:12,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:12,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:12,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905871175] [2022-11-03 02:21:12,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905871175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:12,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:12,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:21:12,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863414243] [2022-11-03 02:21:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:12,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:21:12,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:21:12,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:21:12,188 INFO L87 Difference]: Start difference. First operand 188 states and 308 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:12,257 INFO L93 Difference]: Finished difference Result 211 states and 304 transitions. [2022-11-03 02:21:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:21:12,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:21:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:12,260 INFO L225 Difference]: With dead ends: 211 [2022-11-03 02:21:12,261 INFO L226 Difference]: Without dead ends: 211 [2022-11-03 02:21:12,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:21:12,267 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:12,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 229 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-03 02:21:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2022-11-03 02:21:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 143 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 229 transitions. [2022-11-03 02:21:12,287 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 229 transitions. Word has length 7 [2022-11-03 02:21:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:12,288 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 229 transitions. [2022-11-03 02:21:12,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 229 transitions. [2022-11-03 02:21:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:21:12,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:12,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:12,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:12,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:12,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash 347531241, now seen corresponding path program 1 times [2022-11-03 02:21:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:12,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974426402] [2022-11-03 02:21:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:12,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:12,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:12,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:12,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:21:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:12,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:12,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974426402] [2022-11-03 02:21:12,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974426402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:12,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:12,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:21:12,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979930132] [2022-11-03 02:21:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:12,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:21:12,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:12,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:21:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:21:12,608 INFO L87 Difference]: Start difference. First operand 144 states and 229 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:12,664 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2022-11-03 02:21:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:21:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:21:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:12,666 INFO L225 Difference]: With dead ends: 303 [2022-11-03 02:21:12,666 INFO L226 Difference]: Without dead ends: 303 [2022-11-03 02:21:12,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:21:12,672 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 103 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:12,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 221 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-03 02:21:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 198. [2022-11-03 02:21:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.6559139784946237) internal successors, (308), 197 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2022-11-03 02:21:12,704 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 8 [2022-11-03 02:21:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:12,705 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2022-11-03 02:21:12,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2022-11-03 02:21:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:21:12,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:12,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:12,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:12,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:12,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash -527615340, now seen corresponding path program 1 times [2022-11-03 02:21:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:12,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051430177] [2022-11-03 02:21:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:12,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:12,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:21:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:21:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:13,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:13,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051430177] [2022-11-03 02:21:13,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051430177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:13,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [339331582] [2022-11-03 02:21:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:13,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:13,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:21:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:21:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:13,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:13,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [339331582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984133471] [2022-11-03 02:21:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:13,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:13,255 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:13,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:21:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:13,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:21:13,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:13,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:13,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984133471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:13,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:13,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2022-11-03 02:21:13,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346064562] [2022-11-03 02:21:13,473 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:13,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:21:13,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:21:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:13,476 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:13,752 INFO L93 Difference]: Finished difference Result 911 states and 1342 transitions. [2022-11-03 02:21:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:21:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:21:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:13,758 INFO L225 Difference]: With dead ends: 911 [2022-11-03 02:21:13,758 INFO L226 Difference]: Without dead ends: 911 [2022-11-03 02:21:13,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:21:13,760 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 684 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:13,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 979 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-11-03 02:21:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 438. [2022-11-03 02:21:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 426 states have (on average 1.6314553990610328) internal successors, (695), 437 states have internal predecessors, (695), 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) [2022-11-03 02:21:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 695 transitions. [2022-11-03 02:21:13,779 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 695 transitions. Word has length 12 [2022-11-03 02:21:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:13,779 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 695 transitions. [2022-11-03 02:21:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 695 transitions. [2022-11-03 02:21:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:21:13,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:13,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:13,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:14,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:14,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:14,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:14,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2027186576, now seen corresponding path program 1 times [2022-11-03 02:21:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917667619] [2022-11-03 02:21:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:14,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:14,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:14,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:14,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:21:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:14,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917667619] [2022-11-03 02:21:14,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917667619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [703072663] [2022-11-03 02:21:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:14,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:14,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:21:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:14,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:14,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [703072663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:14,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791299] [2022-11-03 02:21:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:14,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:14,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:14,727 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:14,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:21:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:14,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:14,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:14,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:14,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:14,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:14,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2022-11-03 02:21:14,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030499229] [2022-11-03 02:21:14,872 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:14,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:21:14,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:21:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:21:14,874 INFO L87 Difference]: Start difference. First operand 438 states and 695 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2022-11-03 02:21:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:14,935 INFO L93 Difference]: Finished difference Result 1016 states and 1557 transitions. [2022-11-03 02:21:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:21:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:21:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:14,940 INFO L225 Difference]: With dead ends: 1016 [2022-11-03 02:21:14,940 INFO L226 Difference]: Without dead ends: 1016 [2022-11-03 02:21:14,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:21:14,941 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 289 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:14,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 298 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-11-03 02:21:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 992. [2022-11-03 02:21:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 980 states have (on average 1.5887755102040817) internal successors, (1557), 991 states have internal predecessors, (1557), 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) [2022-11-03 02:21:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1557 transitions. [2022-11-03 02:21:14,971 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1557 transitions. Word has length 12 [2022-11-03 02:21:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:14,972 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1557 transitions. [2022-11-03 02:21:14,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2022-11-03 02:21:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1557 transitions. [2022-11-03 02:21:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:21:14,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:14,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:14,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:15,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:15,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:15,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:15,585 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -480845608, now seen corresponding path program 1 times [2022-11-03 02:21:15,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:15,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334523720] [2022-11-03 02:21:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:15,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:15,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:15,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:21:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:21:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:15,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:15,867 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:15,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334523720] [2022-11-03 02:21:15,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334523720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:15,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1226545761] [2022-11-03 02:21:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:15,868 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:15,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:15,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:15,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:21:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:21:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:16,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:16,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1226545761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434568701] [2022-11-03 02:21:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:16,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:16,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:16,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:16,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:21:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:16,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:21:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:16,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:16,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434568701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:16,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:16,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-03 02:21:16,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730128792] [2022-11-03 02:21:16,304 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:16,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:21:16,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:21:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:21:16,306 INFO L87 Difference]: Start difference. First operand 992 states and 1557 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:16,426 INFO L93 Difference]: Finished difference Result 1261 states and 1908 transitions. [2022-11-03 02:21:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:21:16,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 02:21:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:16,431 INFO L225 Difference]: With dead ends: 1261 [2022-11-03 02:21:16,431 INFO L226 Difference]: Without dead ends: 1261 [2022-11-03 02:21:16,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:21:16,434 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 98 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:16,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 165 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:16,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-11-03 02:21:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1120. [2022-11-03 02:21:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1108 states have (on average 1.5433212996389891) internal successors, (1710), 1119 states have internal predecessors, (1710), 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) [2022-11-03 02:21:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1710 transitions. [2022-11-03 02:21:16,464 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1710 transitions. Word has length 18 [2022-11-03 02:21:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:16,464 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1710 transitions. [2022-11-03 02:21:16,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1710 transitions. [2022-11-03 02:21:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:21:16,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:16,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:16,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:16,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:16,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-03 02:21:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:17,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1323238580, now seen corresponding path program 1 times [2022-11-03 02:21:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:17,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153815164] [2022-11-03 02:21:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:17,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:17,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:17,098 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:17,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:21:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:21:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:17,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:17,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153815164] [2022-11-03 02:21:17,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153815164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2054183583] [2022-11-03 02:21:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:17,272 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:17,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:17,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:21:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:17,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:21:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:17,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:17,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2054183583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192661152] [2022-11-03 02:21:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:17,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:17,469 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:17,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:21:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:21:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:17,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:17,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192661152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:17,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:17,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2022-11-03 02:21:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431153016] [2022-11-03 02:21:17,711 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:17,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:21:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:21:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:17,714 INFO L87 Difference]: Start difference. First operand 1120 states and 1710 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:18,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:18,066 INFO L93 Difference]: Finished difference Result 1823 states and 2654 transitions. [2022-11-03 02:21:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:21:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-03 02:21:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:18,073 INFO L225 Difference]: With dead ends: 1823 [2022-11-03 02:21:18,074 INFO L226 Difference]: Without dead ends: 1823 [2022-11-03 02:21:18,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:21:18,075 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 609 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:18,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1016 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2022-11-03 02:21:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1081. [2022-11-03 02:21:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1069 states have (on average 1.5266604303086997) internal successors, (1632), 1080 states have internal predecessors, (1632), 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) [2022-11-03 02:21:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1632 transitions. [2022-11-03 02:21:18,113 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1632 transitions. Word has length 21 [2022-11-03 02:21:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:18,114 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1632 transitions. [2022-11-03 02:21:18,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1632 transitions. [2022-11-03 02:21:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:21:18,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:18,118 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:18,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:18,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:18,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:18,740 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:18,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2049591299, now seen corresponding path program 1 times [2022-11-03 02:21:18,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:18,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503290162] [2022-11-03 02:21:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:18,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:18,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:18,742 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:18,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:21:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:21:18,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:21:19,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:19,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503290162] [2022-11-03 02:21:19,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503290162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:19,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1397718004] [2022-11-03 02:21:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:19,054 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:19,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:19,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:19,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:21:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:21:19,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:21:19,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1397718004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:19,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737944349] [2022-11-03 02:21:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:19,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:19,325 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:19,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:21:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:21:19,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:19,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737944349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:19,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:21:19,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2022-11-03 02:21:19,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632466293] [2022-11-03 02:21:19,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:19,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:21:19,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:21:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:19,527 INFO L87 Difference]: Start difference. First operand 1081 states and 1632 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-11-03 02:21:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:19,593 INFO L93 Difference]: Finished difference Result 1319 states and 1982 transitions. [2022-11-03 02:21:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:21:19,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-03 02:21:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:19,600 INFO L225 Difference]: With dead ends: 1319 [2022-11-03 02:21:19,600 INFO L226 Difference]: Without dead ends: 1319 [2022-11-03 02:21:19,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:21:19,601 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 64 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:19,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 201 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-11-03 02:21:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1197. [2022-11-03 02:21:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1185 states have (on average 1.5248945147679325) internal successors, (1807), 1196 states have internal predecessors, (1807), 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) [2022-11-03 02:21:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1807 transitions. [2022-11-03 02:21:19,654 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1807 transitions. Word has length 30 [2022-11-03 02:21:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:19,654 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1807 transitions. [2022-11-03 02:21:19,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-11-03 02:21:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1807 transitions. [2022-11-03 02:21:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:21:19,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:19,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:19,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:19,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:20,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:20,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:20,269 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:20,270 INFO L85 PathProgramCache]: Analyzing trace with hash -134919915, now seen corresponding path program 1 times [2022-11-03 02:21:20,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:20,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629186433] [2022-11-03 02:21:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:20,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:20,271 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:20,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:21:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:21:20,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:21:20,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:20,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629186433] [2022-11-03 02:21:20,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629186433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:20,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445901812] [2022-11-03 02:21:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:20,537 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:20,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:20,538 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:20,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:21:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:21:20,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:21:20,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1445901812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:20,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290308140] [2022-11-03 02:21:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:20,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:20,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:20,781 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:20,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:21:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:20,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:21:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:20,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:21,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290308140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:21,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:21,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 13 [2022-11-03 02:21:21,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069419906] [2022-11-03 02:21:21,100 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:21:21,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:21:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:21:21,101 INFO L87 Difference]: Start difference. First operand 1197 states and 1807 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 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) [2022-11-03 02:21:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:21,803 INFO L93 Difference]: Finished difference Result 3756 states and 5513 transitions. [2022-11-03 02:21:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:21:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-03 02:21:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:21,817 INFO L225 Difference]: With dead ends: 3756 [2022-11-03 02:21:21,817 INFO L226 Difference]: Without dead ends: 3756 [2022-11-03 02:21:21,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:21:21,818 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 2191 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:21,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2191 Valid, 1368 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:21:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2022-11-03 02:21:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 2478. [2022-11-03 02:21:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2466 states have (on average 1.5012165450121655) internal successors, (3702), 2477 states have internal predecessors, (3702), 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) [2022-11-03 02:21:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3702 transitions. [2022-11-03 02:21:21,888 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3702 transitions. Word has length 30 [2022-11-03 02:21:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:21,890 INFO L495 AbstractCegarLoop]: Abstraction has 2478 states and 3702 transitions. [2022-11-03 02:21:21,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 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) [2022-11-03 02:21:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3702 transitions. [2022-11-03 02:21:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:21:21,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:21,894 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:21,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:22,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:22,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:22,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:22,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash 971894434, now seen corresponding path program 1 times [2022-11-03 02:21:22,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:22,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490792110] [2022-11-03 02:21:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:22,515 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:22,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:21:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:22,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:22,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:21:22,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:21:22,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:22,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490792110] [2022-11-03 02:21:22,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490792110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:22,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1867895716] [2022-11-03 02:21:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:22,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:22,744 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:22,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:21:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:22,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:21:22,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:21:23,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1867895716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:23,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056505623] [2022-11-03 02:21:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:23,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:23,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:23,018 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:23,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:21:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:21:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:23,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:21:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:21:23,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:21:23,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056505623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:23,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:23,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 4] total 10 [2022-11-03 02:21:23,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546254187] [2022-11-03 02:21:23,318 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:23,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:21:23,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:21:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:23,319 INFO L87 Difference]: Start difference. First operand 2478 states and 3702 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 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) [2022-11-03 02:21:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:26,132 INFO L93 Difference]: Finished difference Result 9527 states and 14376 transitions. [2022-11-03 02:21:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:21:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 02:21:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:26,169 INFO L225 Difference]: With dead ends: 9527 [2022-11-03 02:21:26,169 INFO L226 Difference]: Without dead ends: 9527 [2022-11-03 02:21:26,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:21:26,171 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 971 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:26,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 1180 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:21:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2022-11-03 02:21:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 6617. [2022-11-03 02:21:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6617 states, 6606 states have (on average 1.5207387223735997) internal successors, (10046), 6616 states have internal predecessors, (10046), 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) [2022-11-03 02:21:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6617 states to 6617 states and 10046 transitions. [2022-11-03 02:21:26,366 INFO L78 Accepts]: Start accepts. Automaton has 6617 states and 10046 transitions. Word has length 39 [2022-11-03 02:21:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:26,366 INFO L495 AbstractCegarLoop]: Abstraction has 6617 states and 10046 transitions. [2022-11-03 02:21:26,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 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) [2022-11-03 02:21:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 6617 states and 10046 transitions. [2022-11-03 02:21:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:21:26,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:26,368 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:26,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:26,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:21:26,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-03 02:21:26,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:26,970 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1822753242, now seen corresponding path program 1 times [2022-11-03 02:21:26,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:26,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716645235] [2022-11-03 02:21:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:26,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:26,978 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:27,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:21:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:27,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:21:27,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:27,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:27,319 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716645235] [2022-11-03 02:21:27,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716645235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218611135] [2022-11-03 02:21:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:27,320 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:27,322 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:27,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:21:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:21:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:27,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:27,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218611135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:27,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627116800] [2022-11-03 02:21:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:27,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:27,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:27,682 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:27,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:21:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:27,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:21:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:27,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:28,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627116800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:28,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:28,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-11-03 02:21:28,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560743632] [2022-11-03 02:21:28,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:28,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:21:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:28,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:21:28,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:21:28,063 INFO L87 Difference]: Start difference. First operand 6617 states and 10046 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 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) [2022-11-03 02:21:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:28,983 INFO L93 Difference]: Finished difference Result 10931 states and 16632 transitions. [2022-11-03 02:21:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:21:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 02:21:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:29,018 INFO L225 Difference]: With dead ends: 10931 [2022-11-03 02:21:29,019 INFO L226 Difference]: Without dead ends: 10931 [2022-11-03 02:21:29,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:21:29,020 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 2140 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:29,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2140 Valid, 2240 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:21:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2022-11-03 02:21:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 7404. [2022-11-03 02:21:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7404 states, 7393 states have (on average 1.5160286757743813) internal successors, (11208), 7403 states have internal predecessors, (11208), 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) [2022-11-03 02:21:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7404 states to 7404 states and 11208 transitions. [2022-11-03 02:21:29,246 INFO L78 Accepts]: Start accepts. Automaton has 7404 states and 11208 transitions. Word has length 41 [2022-11-03 02:21:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:29,247 INFO L495 AbstractCegarLoop]: Abstraction has 7404 states and 11208 transitions. [2022-11-03 02:21:29,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 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) [2022-11-03 02:21:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7404 states and 11208 transitions. [2022-11-03 02:21:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:21:29,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:29,250 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:29,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:29,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:29,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:29,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:29,851 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash 34201258, now seen corresponding path program 1 times [2022-11-03 02:21:29,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:29,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005782052] [2022-11-03 02:21:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:29,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:29,854 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:29,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:21:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:21:29,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:30,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:30,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005782052] [2022-11-03 02:21:30,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005782052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917032904] [2022-11-03 02:21:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:30,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:30,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:30,176 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:30,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:21:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:21:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:30,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:30,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917032904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516221589] [2022-11-03 02:21:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:30,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:30,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:30,535 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:30,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:21:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:21:30,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:30,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:30,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516221589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:30,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:30,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-11-03 02:21:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831513309] [2022-11-03 02:21:30,868 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:21:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:30,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:21:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:21:30,870 INFO L87 Difference]: Start difference. First operand 7404 states and 11208 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-11-03 02:21:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:31,026 INFO L93 Difference]: Finished difference Result 7409 states and 11113 transitions. [2022-11-03 02:21:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:21:31,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 02:21:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:31,055 INFO L225 Difference]: With dead ends: 7409 [2022-11-03 02:21:31,055 INFO L226 Difference]: Without dead ends: 7409 [2022-11-03 02:21:31,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:21:31,057 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 106 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:31,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 158 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2022-11-03 02:21:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 7404. [2022-11-03 02:21:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7404 states, 7393 states have (on average 1.5031786825375355) internal successors, (11113), 7403 states have internal predecessors, (11113), 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) [2022-11-03 02:21:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7404 states to 7404 states and 11113 transitions. [2022-11-03 02:21:31,228 INFO L78 Accepts]: Start accepts. Automaton has 7404 states and 11113 transitions. Word has length 50 [2022-11-03 02:21:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:31,228 INFO L495 AbstractCegarLoop]: Abstraction has 7404 states and 11113 transitions. [2022-11-03 02:21:31,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-11-03 02:21:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 7404 states and 11113 transitions. [2022-11-03 02:21:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:21:31,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:31,231 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:31,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:31,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-03 02:21:31,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-03 02:21:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:31,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1339034764, now seen corresponding path program 1 times [2022-11-03 02:21:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:31,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790436729] [2022-11-03 02:21:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:31,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:31,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:31,846 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:31,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:21:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:32,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:32,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:21:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:21:32,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:21:32,994 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790436729] [2022-11-03 02:21:32,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790436729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [900279070] [2022-11-03 02:21:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:32,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:33,000 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:33,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:21:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:33,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:21:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:21:33,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:21:34,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [900279070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447133852] [2022-11-03 02:21:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:34,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:34,048 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:34,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:21:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:34,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:34,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:21:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:21:34,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:21:34,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447133852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:34,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:34,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-11-03 02:21:34,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974877716] [2022-11-03 02:21:34,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:34,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:21:34,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:21:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:21:34,959 INFO L87 Difference]: Start difference. First operand 7404 states and 11113 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 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) [2022-11-03 02:21:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:36,029 INFO L93 Difference]: Finished difference Result 12125 states and 17913 transitions. [2022-11-03 02:21:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:21:36,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-03 02:21:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:36,062 INFO L225 Difference]: With dead ends: 12125 [2022-11-03 02:21:36,062 INFO L226 Difference]: Without dead ends: 12125 [2022-11-03 02:21:36,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:21:36,063 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 374 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:36,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 382 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:21:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12125 states. [2022-11-03 02:21:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12125 to 10720. [2022-11-03 02:21:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10720 states, 10709 states have (on average 1.4964048930805864) internal successors, (16025), 10719 states have internal predecessors, (16025), 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) [2022-11-03 02:21:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10720 states to 10720 states and 16025 transitions. [2022-11-03 02:21:36,277 INFO L78 Accepts]: Start accepts. Automaton has 10720 states and 16025 transitions. Word has length 53 [2022-11-03 02:21:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:36,277 INFO L495 AbstractCegarLoop]: Abstraction has 10720 states and 16025 transitions. [2022-11-03 02:21:36,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 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) [2022-11-03 02:21:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 10720 states and 16025 transitions. [2022-11-03 02:21:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:21:36,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:36,280 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:36,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:36,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-11-03 02:21:36,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-03 02:21:36,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:36,893 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1485538747, now seen corresponding path program 1 times [2022-11-03 02:21:36,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:36,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744046828] [2022-11-03 02:21:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:36,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:36,895 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:36,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:21:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:21:37,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:21:37,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:37,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744046828] [2022-11-03 02:21:37,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744046828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:37,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686986907] [2022-11-03 02:21:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:37,298 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:37,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:37,300 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:37,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:21:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:37,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:21:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:21:37,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:21:37,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [686986907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:37,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351915842] [2022-11-03 02:21:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:37,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:37,840 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:37,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:21:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:38,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:21:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:21:38,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:21:38,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351915842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:38,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:38,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 6, 6, 6] total 14 [2022-11-03 02:21:38,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947629581] [2022-11-03 02:21:38,410 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:38,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:21:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:21:38,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:21:38,412 INFO L87 Difference]: Start difference. First operand 10720 states and 16025 transitions. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 14 states have internal predecessors, (101), 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) [2022-11-03 02:21:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:39,109 INFO L93 Difference]: Finished difference Result 30008 states and 43020 transitions. [2022-11-03 02:21:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:21:39,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-03 02:21:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:39,177 INFO L225 Difference]: With dead ends: 30008 [2022-11-03 02:21:39,177 INFO L226 Difference]: Without dead ends: 30008 [2022-11-03 02:21:39,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:21:39,179 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 1665 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:39,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 1747 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:21:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30008 states. [2022-11-03 02:21:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30008 to 20704. [2022-11-03 02:21:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20704 states, 20693 states have (on average 1.47069057169091) internal successors, (30433), 20703 states have internal predecessors, (30433), 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) [2022-11-03 02:21:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20704 states to 20704 states and 30433 transitions. [2022-11-03 02:21:39,687 INFO L78 Accepts]: Start accepts. Automaton has 20704 states and 30433 transitions. Word has length 65 [2022-11-03 02:21:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:39,687 INFO L495 AbstractCegarLoop]: Abstraction has 20704 states and 30433 transitions. [2022-11-03 02:21:39,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 14 states have internal predecessors, (101), 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) [2022-11-03 02:21:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 20704 states and 30433 transitions. [2022-11-03 02:21:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:21:39,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:39,690 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 5, 4, 4, 4, 3, 3, 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, 1, 1] [2022-11-03 02:21:39,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 02:21:39,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:40,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:40,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:40,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 02:21:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1631832859, now seen corresponding path program 1 times [2022-11-03 02:21:40,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:40,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149071748] [2022-11-03 02:21:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:40,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:40,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:40,295 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:40,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:21:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:21:40,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:21:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:21:40,644 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-03 02:21:40,645 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:21:40,646 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-03 02:21:40,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-03 02:21:40,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-03 02:21:40,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-03 02:21:40,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-03 02:21:40,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-03 02:21:40,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-03 02:21:40,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-03 02:21:40,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-03 02:21:40,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-03 02:21:40,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-03 02:21:40,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 20 remaining) [2022-11-03 02:21:40,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2022-11-03 02:21:40,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2022-11-03 02:21:40,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2022-11-03 02:21:40,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2022-11-03 02:21:40,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2022-11-03 02:21:40,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-03 02:21:40,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-03 02:21:40,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-03 02:21:40,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:40,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:21:40,869 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:40,873 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:21:40,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:21:40 BoogieIcfgContainer [2022-11-03 02:21:40,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:21:40,954 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:21:40,954 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:21:40,954 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:21:40,955 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:21:09" (3/4) ... [2022-11-03 02:21:40,958 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:21:40,958 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:21:40,959 INFO L158 Benchmark]: Toolchain (without parser) took 33032.95ms. Allocated memory was 71.3MB in the beginning and 268.4MB in the end (delta: 197.1MB). Free memory was 50.7MB in the beginning and 112.9MB in the end (delta: -62.2MB). Peak memory consumption was 135.3MB. Max. memory is 16.1GB. [2022-11-03 02:21:40,959 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 71.3MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:21:40,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 606.13ms. Allocated memory is still 71.3MB. Free memory was 50.4MB in the beginning and 46.8MB in the end (delta: 3.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:21:40,960 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.91ms. Allocated memory is still 71.3MB. Free memory was 46.8MB in the beginning and 44.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:21:40,960 INFO L158 Benchmark]: Boogie Preprocessor took 59.97ms. Allocated memory is still 71.3MB. Free memory was 44.5MB in the beginning and 42.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:21:40,961 INFO L158 Benchmark]: RCFGBuilder took 760.55ms. Allocated memory is still 71.3MB. Free memory was 42.6MB in the beginning and 45.8MB in the end (delta: -3.1MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. [2022-11-03 02:21:40,961 INFO L158 Benchmark]: TraceAbstraction took 31523.24ms. Allocated memory was 71.3MB in the beginning and 268.4MB in the end (delta: 197.1MB). Free memory was 45.2MB in the beginning and 112.9MB in the end (delta: -67.7MB). Peak memory consumption was 129.6MB. Max. memory is 16.1GB. [2022-11-03 02:21:40,961 INFO L158 Benchmark]: Witness Printer took 4.77ms. Allocated memory is still 268.4MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:21:40,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 71.3MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 606.13ms. Allocated memory is still 71.3MB. Free memory was 50.4MB in the beginning and 46.8MB in the end (delta: 3.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.91ms. Allocated memory is still 71.3MB. Free memory was 46.8MB in the beginning and 44.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.97ms. Allocated memory is still 71.3MB. Free memory was 44.5MB in the beginning and 42.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 760.55ms. Allocated memory is still 71.3MB. Free memory was 42.6MB in the beginning and 45.8MB in the end (delta: -3.1MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. * TraceAbstraction took 31523.24ms. Allocated memory was 71.3MB in the beginning and 268.4MB in the end (delta: 197.1MB). Free memory was 45.2MB in the beginning and 112.9MB in the end (delta: -67.7MB). Peak memory consumption was 129.6MB. Max. memory is 16.1GB. * Witness Printer took 4.77ms. Allocated memory is still 268.4MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: VAL [garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L542] x1->data = 4 VAL [garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L548] x1->next = t1 VAL [garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={6:0}, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={6:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L598] RET pop() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: VAL [garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={6:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={6:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L598] RET pop() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={6:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L576] EXPR t4->next VAL [garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={6:0}, t1={0:0}, t4={6:0}, t4->next={0:0}, x1={6:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={6:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L598] RET pop() [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 62 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 31.4s, OverallIterations: 18, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9647 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9647 mSDsluCounter, 10766 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8381 mSDsCounter, 570 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2445 IncrementalHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 570 mSolverCounterUnsat, 2385 mSDtfsCounter, 2445 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2342 GetRequests, 2108 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20704occurred in iteration=17, InterpolantAutomatonStates: 222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 17 MinimizatonAttempts, 20180 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 1227 NumberOfCodeBlocks, 1227 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2163 ConstructedInterpolants, 0 QuantifiedInterpolants, 9133 SizeOfPredicates, 106 NumberOfNonLiveVariables, 4862 ConjunctsInSsa, 254 ConjunctsInUnsatCore, 71 InterpolantComputations, 7 PerfectInterpolantSequences, 1756/2966 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:21:41,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a213c99-66bd-4324-8c34-408333c47353/bin/utaipan-7li7fVZpFI/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: UNKNOWN: Overapproximated counterexample