./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW --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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- 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-4e7fbc6 [2022-11-23 14:40:27,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:40:27,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:40:27,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:40:27,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:40:27,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:40:27,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:40:27,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:40:27,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:40:27,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:40:27,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:40:27,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:40:27,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:40:27,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:40:27,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:40:27,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:40:27,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:40:27,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:40:27,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:40:27,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:40:27,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:40:27,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:40:27,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:40:27,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:40:27,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:40:27,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:40:27,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:40:27,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:40:27,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:40:27,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:40:27,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:40:27,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:40:27,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:40:27,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:40:27,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:40:27,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:40:27,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:40:27,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:40:27,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:40:27,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:40:27,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:40:27,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:40:27,494 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:40:27,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:40:27,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:40:27,495 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:40:27,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:40:27,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:40:27,496 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:40:27,497 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:40:27,497 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:40:27,497 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:40:27,498 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:40:27,498 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:40:27,498 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:40:27,498 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:40:27,499 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:40:27,499 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:40:27,499 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:40:27,499 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:40:27,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:40:27,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:40:27,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:40:27,500 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:40:27,500 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:40:27,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:40:27,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:40:27,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:40:27,501 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:40:27,501 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:40:27,501 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:40:27,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:40:27,502 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:40:27,502 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:40:27,502 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:40:27,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:40:27,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:40:27,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:40:27,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:40:27,503 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:40:27,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:40:27,504 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:40:27,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:40:27,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:40:27,505 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_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2022-11-23 14:40:27,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:40:27,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:40:27,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:40:27,767 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:40:27,767 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:40:27,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-11-23 14:40:30,826 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:40:31,062 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:40:31,067 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-11-23 14:40:31,077 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/data/08247734f/37dd911d89ca454097b7d66047d6e774/FLAGde9e65025 [2022-11-23 14:40:31,089 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/data/08247734f/37dd911d89ca454097b7d66047d6e774 [2022-11-23 14:40:31,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:40:31,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:40:31,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:40:31,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:40:31,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:40:31,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab44ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31, skipping insertion in model container [2022-11-23 14:40:31,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:40:31,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:40:31,326 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 14:40:31,526 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-11-23 14:40:31,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:40:31,553 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:40:31,580 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 14:40:31,612 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-11-23 14:40:31,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:40:31,655 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:40:31,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31 WrapperNode [2022-11-23 14:40:31,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:40:31,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:40:31,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:40:31,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:40:31,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,718 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-11-23 14:40:31,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:40:31,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:40:31,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:40:31,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:40:31,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,743 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:40:31,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:40:31,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:40:31,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:40:31,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (1/1) ... [2022-11-23 14:40:31,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:40:31,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:31,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:40:31,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be2e45-f174-462d-8f45-dcc59f123521/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:40:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:40:31,837 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-23 14:40:31,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-23 14:40:31,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:40:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 14:40:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:40:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:40:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:40:31,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:40:31,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 14:40:31,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:40:31,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:40:31,841 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 14:40:32,092 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:40:32,094 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:40:32,366 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:40:32,542 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:40:32,543 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 14:40:32,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:32 BoogieIcfgContainer [2022-11-23 14:40:32,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:40:32,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:40:32,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:40:32,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:40:32,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:40:31" (1/3) ... [2022-11-23 14:40:32,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbed7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:32, skipping insertion in model container [2022-11-23 14:40:32,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:31" (2/3) ... [2022-11-23 14:40:32,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbed7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:32, skipping insertion in model container [2022-11-23 14:40:32,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:32" (3/3) ... [2022-11-23 14:40:32,561 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2022-11-23 14:40:32,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:40:32,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-23 14:40:32,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:40:32,696 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:40:32,744 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:40:32,766 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 89 transitions, 183 flow [2022-11-23 14:40:32,770 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 89 transitions, 183 flow [2022-11-23 14:40:32,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 89 transitions, 183 flow [2022-11-23 14:40:32,844 INFO L130 PetriNetUnfolder]: 8/136 cut-off events. [2022-11-23 14:40:32,844 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 14:40:32,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 136 events. 8/136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 305 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2022-11-23 14:40:32,851 INFO L119 LiptonReduction]: Number of co-enabled transitions 2100 [2022-11-23 14:40:34,983 INFO L134 LiptonReduction]: Checked pairs total: 6320 [2022-11-23 14:40:34,983 INFO L136 LiptonReduction]: Total number of compositions: 71 [2022-11-23 14:40:34,995 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 41 transitions, 87 flow [2022-11-23 14:40:35,042 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 334 states, 267 states have (on average 2.5655430711610485) internal successors, (685), 333 states have internal predecessors, (685), 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) [2022-11-23 14:40:35,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:40:35,074 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;@585a6051, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:40:35,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-23 14:40:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 334 states, 267 states have (on average 2.5655430711610485) internal successors, (685), 333 states have internal predecessors, (685), 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) [2022-11-23 14:40:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:40:35,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:35,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:40:35,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash 13910, now seen corresponding path program 1 times [2022-11-23 14:40:35,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:35,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404980656] [2022-11-23 14:40:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:35,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:35,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:35,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404980656] [2022-11-23 14:40:35,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404980656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:35,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:35,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:40:35,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503033822] [2022-11-23 14:40:35,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:35,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:35,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:35,421 INFO L87 Difference]: Start difference. First operand has 334 states, 267 states have (on average 2.5655430711610485) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:35,575 INFO L93 Difference]: Finished difference Result 322 states and 622 transitions. [2022-11-23 14:40:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 14:40:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:35,589 INFO L225 Difference]: With dead ends: 322 [2022-11-23 14:40:35,590 INFO L226 Difference]: Without dead ends: 322 [2022-11-23 14:40:35,590 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 [2022-11-23 14:40:35,593 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:35,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 20 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-23 14:40:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2022-11-23 14:40:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 259 states have (on average 2.3976833976833976) internal successors, (621), 319 states have internal predecessors, (621), 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) [2022-11-23 14:40:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 621 transitions. [2022-11-23 14:40:35,656 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 621 transitions. Word has length 2 [2022-11-23 14:40:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:35,656 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 621 transitions. [2022-11-23 14:40:35,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 621 transitions. [2022-11-23 14:40:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:40:35,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:35,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:40:35,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:40:35,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash 13912, now seen corresponding path program 1 times [2022-11-23 14:40:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111595385] [2022-11-23 14:40:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:35,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:35,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:35,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111595385] [2022-11-23 14:40:35,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111595385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:35,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:35,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:40:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458890054] [2022-11-23 14:40:35,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:35,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:35,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:35,755 INFO L87 Difference]: Start difference. First operand 320 states and 621 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:35,832 INFO L93 Difference]: Finished difference Result 305 states and 592 transitions. [2022-11-23 14:40:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 14:40:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:35,835 INFO L225 Difference]: With dead ends: 305 [2022-11-23 14:40:35,835 INFO L226 Difference]: Without dead ends: 305 [2022-11-23 14:40:35,835 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 [2022-11-23 14:40:35,836 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:35,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-23 14:40:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-11-23 14:40:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 251 states have (on average 2.358565737051793) internal successors, (592), 304 states have internal predecessors, (592), 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) [2022-11-23 14:40:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 592 transitions. [2022-11-23 14:40:35,869 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 592 transitions. Word has length 2 [2022-11-23 14:40:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:35,869 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 592 transitions. [2022-11-23 14:40:35,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 592 transitions. [2022-11-23 14:40:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:40:35,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:35,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:40:35,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:40:35,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash 431777, now seen corresponding path program 1 times [2022-11-23 14:40:35,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:35,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234298820] [2022-11-23 14:40:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:35,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:36,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:36,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234298820] [2022-11-23 14:40:36,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234298820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:36,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:36,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342983761] [2022-11-23 14:40:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:36,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:36,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:36,071 INFO L87 Difference]: Start difference. First operand 305 states and 592 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:36,179 INFO L93 Difference]: Finished difference Result 275 states and 534 transitions. [2022-11-23 14:40:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:40:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:36,183 INFO L225 Difference]: With dead ends: 275 [2022-11-23 14:40:36,183 INFO L226 Difference]: Without dead ends: 275 [2022-11-23 14:40:36,184 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 [2022-11-23 14:40:36,187 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:36,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-23 14:40:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-11-23 14:40:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 235 states have (on average 2.272340425531915) internal successors, (534), 274 states have internal predecessors, (534), 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) [2022-11-23 14:40:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 534 transitions. [2022-11-23 14:40:36,217 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 534 transitions. Word has length 3 [2022-11-23 14:40:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:36,218 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 534 transitions. [2022-11-23 14:40:36,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 534 transitions. [2022-11-23 14:40:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:40:36,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:36,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:40:36,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:40:36,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:36,220 INFO L85 PathProgramCache]: Analyzing trace with hash 431776, now seen corresponding path program 1 times [2022-11-23 14:40:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:36,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294799211] [2022-11-23 14:40:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:36,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:36,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294799211] [2022-11-23 14:40:36,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294799211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:36,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:36,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489167028] [2022-11-23 14:40:36,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:36,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:36,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:36,314 INFO L87 Difference]: Start difference. First operand 275 states and 534 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:36,389 INFO L93 Difference]: Finished difference Result 255 states and 487 transitions. [2022-11-23 14:40:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:40:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:36,392 INFO L225 Difference]: With dead ends: 255 [2022-11-23 14:40:36,392 INFO L226 Difference]: Without dead ends: 255 [2022-11-23 14:40:36,392 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 [2022-11-23 14:40:36,393 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:36,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-23 14:40:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 249. [2022-11-23 14:40:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 221 states have (on average 2.176470588235294) internal successors, (481), 248 states have internal predecessors, (481), 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) [2022-11-23 14:40:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 481 transitions. [2022-11-23 14:40:36,403 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 481 transitions. Word has length 3 [2022-11-23 14:40:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:36,403 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 481 transitions. [2022-11-23 14:40:36,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 481 transitions. [2022-11-23 14:40:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:40:36,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:36,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:40:36,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:40:36,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash 414754832, now seen corresponding path program 1 times [2022-11-23 14:40:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:36,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144856918] [2022-11-23 14:40:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:36,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:36,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:36,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144856918] [2022-11-23 14:40:36,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144856918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:36,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:36,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933406693] [2022-11-23 14:40:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:36,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:36,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:36,456 INFO L87 Difference]: Start difference. First operand 249 states and 481 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:36,532 INFO L93 Difference]: Finished difference Result 269 states and 512 transitions. [2022-11-23 14:40:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:36,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2022-11-23 14:40:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:36,534 INFO L225 Difference]: With dead ends: 269 [2022-11-23 14:40:36,534 INFO L226 Difference]: Without dead ends: 269 [2022-11-23 14:40:36,535 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 [2022-11-23 14:40:36,536 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:36,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-23 14:40:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 235. [2022-11-23 14:40:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 211 states have (on average 2.199052132701422) internal successors, (464), 234 states have internal predecessors, (464), 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) [2022-11-23 14:40:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 464 transitions. [2022-11-23 14:40:36,544 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 464 transitions. Word has length 5 [2022-11-23 14:40:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:36,545 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 464 transitions. [2022-11-23 14:40:36,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 464 transitions. [2022-11-23 14:40:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:40:36,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:36,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:40:36,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:40:36,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash 414754833, now seen corresponding path program 1 times [2022-11-23 14:40:36,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420588383] [2022-11-23 14:40:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:36,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:36,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420588383] [2022-11-23 14:40:36,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420588383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:36,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:36,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:36,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295377303] [2022-11-23 14:40:36,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:36,651 INFO L87 Difference]: Start difference. First operand 235 states and 464 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:36,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:36,729 INFO L93 Difference]: Finished difference Result 201 states and 386 transitions. [2022-11-23 14:40:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:36,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2022-11-23 14:40:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:36,732 INFO L225 Difference]: With dead ends: 201 [2022-11-23 14:40:36,732 INFO L226 Difference]: Without dead ends: 201 [2022-11-23 14:40:36,732 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 [2022-11-23 14:40:36,735 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:36,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-23 14:40:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-23 14:40:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 185 states have (on average 2.0864864864864865) internal successors, (386), 200 states have internal predecessors, (386), 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) [2022-11-23 14:40:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 386 transitions. [2022-11-23 14:40:36,746 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 386 transitions. Word has length 5 [2022-11-23 14:40:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:36,746 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 386 transitions. [2022-11-23 14:40:36,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 386 transitions. [2022-11-23 14:40:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:40:36,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:36,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:40:36,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:40:36,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash -21504981, now seen corresponding path program 1 times [2022-11-23 14:40:36,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:36,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259446481] [2022-11-23 14:40:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:36,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:36,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:36,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259446481] [2022-11-23 14:40:36,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259446481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:36,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:36,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:36,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398336385] [2022-11-23 14:40:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:36,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:36,848 INFO L87 Difference]: Start difference. First operand 201 states and 386 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) [2022-11-23 14:40:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:36,924 INFO L93 Difference]: Finished difference Result 202 states and 381 transitions. [2022-11-23 14:40:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:36,925 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 [2022-11-23 14:40:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:36,926 INFO L225 Difference]: With dead ends: 202 [2022-11-23 14:40:36,926 INFO L226 Difference]: Without dead ends: 192 [2022-11-23 14:40:36,926 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 [2022-11-23 14:40:36,927 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:36,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-23 14:40:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2022-11-23 14:40:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 171 states have (on average 1.9941520467836258) internal successors, (341), 183 states have internal predecessors, (341), 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) [2022-11-23 14:40:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 341 transitions. [2022-11-23 14:40:36,934 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 341 transitions. Word has length 6 [2022-11-23 14:40:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:36,934 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 341 transitions. [2022-11-23 14:40:36,934 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) [2022-11-23 14:40:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 341 transitions. [2022-11-23 14:40:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:40:36,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:36,935 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 14:40:36,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:40:36,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-23 14:40:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash -27487720, now seen corresponding path program 1 times [2022-11-23 14:40:36,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:36,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725168049] [2022-11-23 14:40:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:40:36,951 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:40:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:40:36,985 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:40:36,985 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:40:36,986 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 19 remaining) [2022-11-23 14:40:36,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2022-11-23 14:40:36,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2022-11-23 14:40:36,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2022-11-23 14:40:36,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2022-11-23 14:40:36,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (13 of 19 remaining) [2022-11-23 14:40:36,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2022-11-23 14:40:36,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2022-11-23 14:40:36,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2022-11-23 14:40:36,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2022-11-23 14:40:36,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2022-11-23 14:40:36,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2022-11-23 14:40:36,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (6 of 19 remaining) [2022-11-23 14:40:36,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (5 of 19 remaining) [2022-11-23 14:40:36,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2022-11-23 14:40:36,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2022-11-23 14:40:36,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2022-11-23 14:40:36,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2022-11-23 14:40:36,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2022-11-23 14:40:36,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:40:36,995 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:36,997 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:40:36,997 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 14:40:37,038 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:40:37,049 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:40:37,049 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 111 transitions, 234 flow [2022-11-23 14:40:37,050 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 111 transitions, 234 flow [2022-11-23 14:40:37,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 234 flow [2022-11-23 14:40:37,117 INFO L130 PetriNetUnfolder]: 13/207 cut-off events. [2022-11-23 14:40:37,117 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 14:40:37,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 207 events. 13/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 641 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 137. Up to 6 conditions per place. [2022-11-23 14:40:37,125 INFO L119 LiptonReduction]: Number of co-enabled transitions 5124 [2022-11-23 14:40:39,294 INFO L134 LiptonReduction]: Checked pairs total: 21378 [2022-11-23 14:40:39,294 INFO L136 LiptonReduction]: Total number of compositions: 82 [2022-11-23 14:40:39,295 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 58 transitions, 128 flow [2022-11-23 14:40:39,439 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5006 states, 4586 states have (on average 3.394461404273877) internal successors, (15567), 5005 states have internal predecessors, (15567), 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) [2022-11-23 14:40:39,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:40:39,441 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;@585a6051, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:40:39,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-23 14:40:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 5006 states, 4586 states have (on average 3.394461404273877) internal successors, (15567), 5005 states have internal predecessors, (15567), 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) [2022-11-23 14:40:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:40:39,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:39,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:40:39,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash 20723, now seen corresponding path program 1 times [2022-11-23 14:40:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:39,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901450001] [2022-11-23 14:40:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:39,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901450001] [2022-11-23 14:40:39,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901450001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:39,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:39,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:40:39,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796418335] [2022-11-23 14:40:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:39,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:39,546 INFO L87 Difference]: Start difference. First operand has 5006 states, 4586 states have (on average 3.394461404273877) internal successors, (15567), 5005 states have internal predecessors, (15567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:39,674 INFO L93 Difference]: Finished difference Result 4795 states and 14062 transitions. [2022-11-23 14:40:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 14:40:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:39,719 INFO L225 Difference]: With dead ends: 4795 [2022-11-23 14:40:39,719 INFO L226 Difference]: Without dead ends: 4795 [2022-11-23 14:40:39,720 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 [2022-11-23 14:40:39,720 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:39,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 27 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2022-11-23 14:40:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 4795. [2022-11-23 14:40:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 4418 states have (on average 3.182888184698959) internal successors, (14062), 4794 states have internal predecessors, (14062), 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) [2022-11-23 14:40:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 14062 transitions. [2022-11-23 14:40:39,883 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 14062 transitions. Word has length 2 [2022-11-23 14:40:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:39,884 INFO L495 AbstractCegarLoop]: Abstraction has 4795 states and 14062 transitions. [2022-11-23 14:40:39,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 14062 transitions. [2022-11-23 14:40:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:40:39,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:39,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:40:39,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:40:39,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash 20725, now seen corresponding path program 1 times [2022-11-23 14:40:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:39,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112174837] [2022-11-23 14:40:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:39,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:39,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:39,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112174837] [2022-11-23 14:40:39,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112174837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:39,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:39,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:40:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208673520] [2022-11-23 14:40:39,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:39,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:39,908 INFO L87 Difference]: Start difference. First operand 4795 states and 14062 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:40,049 INFO L93 Difference]: Finished difference Result 4862 states and 14016 transitions. [2022-11-23 14:40:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 14:40:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:40,156 INFO L225 Difference]: With dead ends: 4862 [2022-11-23 14:40:40,157 INFO L226 Difference]: Without dead ends: 4862 [2022-11-23 14:40:40,157 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 [2022-11-23 14:40:40,158 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:40,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2022-11-23 14:40:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4652. [2022-11-23 14:40:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4306 states have (on average 3.157454714352067) internal successors, (13596), 4651 states have internal predecessors, (13596), 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) [2022-11-23 14:40:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13596 transitions. [2022-11-23 14:40:40,333 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13596 transitions. Word has length 2 [2022-11-23 14:40:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:40,334 INFO L495 AbstractCegarLoop]: Abstraction has 4652 states and 13596 transitions. [2022-11-23 14:40:40,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13596 transitions. [2022-11-23 14:40:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:40:40,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:40,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:40:40,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:40:40,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 643223, now seen corresponding path program 1 times [2022-11-23 14:40:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054551356] [2022-11-23 14:40:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:40,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054551356] [2022-11-23 14:40:40,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054551356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:40,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:40,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980546438] [2022-11-23 14:40:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:40,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:40,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:40,373 INFO L87 Difference]: Start difference. First operand 4652 states and 13596 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:40,505 INFO L93 Difference]: Finished difference Result 4566 states and 13062 transitions. [2022-11-23 14:40:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:40:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:40,551 INFO L225 Difference]: With dead ends: 4566 [2022-11-23 14:40:40,552 INFO L226 Difference]: Without dead ends: 4566 [2022-11-23 14:40:40,552 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 [2022-11-23 14:40:40,552 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:40,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2022-11-23 14:40:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4342. [2022-11-23 14:40:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4058 states have (on average 3.122227698373583) internal successors, (12670), 4341 states have internal predecessors, (12670), 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) [2022-11-23 14:40:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 12670 transitions. [2022-11-23 14:40:40,727 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 12670 transitions. Word has length 3 [2022-11-23 14:40:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:40,728 INFO L495 AbstractCegarLoop]: Abstraction has 4342 states and 12670 transitions. [2022-11-23 14:40:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 12670 transitions. [2022-11-23 14:40:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:40:40,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:40,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:40:40,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:40:40,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 643224, now seen corresponding path program 1 times [2022-11-23 14:40:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:40,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383405689] [2022-11-23 14:40:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:40,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:40,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:40,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383405689] [2022-11-23 14:40:40,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383405689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:40,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:40,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447846666] [2022-11-23 14:40:40,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:40,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:40,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:40,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:40,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:40,803 INFO L87 Difference]: Start difference. First operand 4342 states and 12670 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:40,919 INFO L93 Difference]: Finished difference Result 3920 states and 11380 transitions. [2022-11-23 14:40:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:40:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:40,936 INFO L225 Difference]: With dead ends: 3920 [2022-11-23 14:40:40,937 INFO L226 Difference]: Without dead ends: 3920 [2022-11-23 14:40:40,937 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 [2022-11-23 14:40:40,938 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:40,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-11-23 14:40:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3920. [2022-11-23 14:40:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3722 states have (on average 3.0574959699086515) internal successors, (11380), 3919 states have internal predecessors, (11380), 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) [2022-11-23 14:40:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 11380 transitions. [2022-11-23 14:40:41,055 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 11380 transitions. Word has length 3 [2022-11-23 14:40:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:41,055 INFO L495 AbstractCegarLoop]: Abstraction has 3920 states and 11380 transitions. [2022-11-23 14:40:41,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 11380 transitions. [2022-11-23 14:40:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:40:41,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:41,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:40:41,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:40:41,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 617922742, now seen corresponding path program 1 times [2022-11-23 14:40:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962040975] [2022-11-23 14:40:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:41,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:41,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962040975] [2022-11-23 14:40:41,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962040975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:41,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:41,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107202671] [2022-11-23 14:40:41,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:41,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:41,160 INFO L87 Difference]: Start difference. First operand 3920 states and 11380 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:41,319 INFO L93 Difference]: Finished difference Result 4458 states and 12691 transitions. [2022-11-23 14:40:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2022-11-23 14:40:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:41,339 INFO L225 Difference]: With dead ends: 4458 [2022-11-23 14:40:41,340 INFO L226 Difference]: Without dead ends: 4458 [2022-11-23 14:40:41,340 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 [2022-11-23 14:40:41,341 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:41,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 41 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2022-11-23 14:40:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 3744. [2022-11-23 14:40:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3568 states have (on average 3.0905269058295963) internal successors, (11027), 3743 states have internal predecessors, (11027), 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) [2022-11-23 14:40:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 11027 transitions. [2022-11-23 14:40:41,452 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 11027 transitions. Word has length 5 [2022-11-23 14:40:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:41,452 INFO L495 AbstractCegarLoop]: Abstraction has 3744 states and 11027 transitions. [2022-11-23 14:40:41,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 11027 transitions. [2022-11-23 14:40:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:40:41,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:41,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:40:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:40:41,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash 617922743, now seen corresponding path program 1 times [2022-11-23 14:40:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:41,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820820288] [2022-11-23 14:40:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:41,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:41,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820820288] [2022-11-23 14:40:41,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820820288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:41,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:41,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:41,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208245943] [2022-11-23 14:40:41,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:41,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:41,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:41,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:41,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:41,526 INFO L87 Difference]: Start difference. First operand 3744 states and 11027 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:41,633 INFO L93 Difference]: Finished difference Result 3196 states and 9237 transitions. [2022-11-23 14:40:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2022-11-23 14:40:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:41,645 INFO L225 Difference]: With dead ends: 3196 [2022-11-23 14:40:41,646 INFO L226 Difference]: Without dead ends: 3196 [2022-11-23 14:40:41,646 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 [2022-11-23 14:40:41,647 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:41,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-11-23 14:40:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3196. [2022-11-23 14:40:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3080 states have (on average 2.999025974025974) internal successors, (9237), 3195 states have internal predecessors, (9237), 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) [2022-11-23 14:40:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 9237 transitions. [2022-11-23 14:40:41,774 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 9237 transitions. Word has length 5 [2022-11-23 14:40:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:41,774 INFO L495 AbstractCegarLoop]: Abstraction has 3196 states and 9237 transitions. [2022-11-23 14:40:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:40:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 9237 transitions. [2022-11-23 14:40:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:40:41,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:41,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:40:41,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:40:41,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:41,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1982926062, now seen corresponding path program 1 times [2022-11-23 14:40:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:41,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908388984] [2022-11-23 14:40:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:41,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:41,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908388984] [2022-11-23 14:40:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908388984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:41,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:41,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:41,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739714929] [2022-11-23 14:40:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:41,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:41,847 INFO L87 Difference]: Start difference. First operand 3196 states and 9237 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) [2022-11-23 14:40:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:41,971 INFO L93 Difference]: Finished difference Result 3543 states and 10028 transitions. [2022-11-23 14:40:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:41,972 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 [2022-11-23 14:40:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:41,984 INFO L225 Difference]: With dead ends: 3543 [2022-11-23 14:40:41,984 INFO L226 Difference]: Without dead ends: 3503 [2022-11-23 14:40:41,985 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 [2022-11-23 14:40:41,985 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:41,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2022-11-23 14:40:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3217. [2022-11-23 14:40:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3113 states have (on average 2.937038226790877) internal successors, (9143), 3216 states have internal predecessors, (9143), 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) [2022-11-23 14:40:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 9143 transitions. [2022-11-23 14:40:42,074 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 9143 transitions. Word has length 6 [2022-11-23 14:40:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:42,075 INFO L495 AbstractCegarLoop]: Abstraction has 3217 states and 9143 transitions. [2022-11-23 14:40:42,075 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) [2022-11-23 14:40:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 9143 transitions. [2022-11-23 14:40:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:40:42,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:42,076 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:40:42,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1354149882, now seen corresponding path program 1 times [2022-11-23 14:40:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:42,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760310659] [2022-11-23 14:40:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:40:42,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:42,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760310659] [2022-11-23 14:40:42,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760310659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:42,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:42,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:42,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773614791] [2022-11-23 14:40:42,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:42,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:42,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:42,123 INFO L87 Difference]: Start difference. First operand 3217 states and 9143 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-11-23 14:40:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:42,248 INFO L93 Difference]: Finished difference Result 3817 states and 10720 transitions. [2022-11-23 14:40:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-23 14:40:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:42,262 INFO L225 Difference]: With dead ends: 3817 [2022-11-23 14:40:42,262 INFO L226 Difference]: Without dead ends: 3817 [2022-11-23 14:40:42,262 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 [2022-11-23 14:40:42,263 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:42,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2022-11-23 14:40:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3191. [2022-11-23 14:40:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3087 states have (on average 2.996760609005507) internal successors, (9251), 3190 states have internal predecessors, (9251), 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) [2022-11-23 14:40:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 9251 transitions. [2022-11-23 14:40:42,398 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 9251 transitions. Word has length 9 [2022-11-23 14:40:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:42,400 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 9251 transitions. [2022-11-23 14:40:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-11-23 14:40:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 9251 transitions. [2022-11-23 14:40:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:40:42,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:42,401 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:42,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:40:42,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1354149881, now seen corresponding path program 1 times [2022-11-23 14:40:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:42,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331138040] [2022-11-23 14:40:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:42,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:40:42,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:42,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331138040] [2022-11-23 14:40:42,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331138040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:42,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:42,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:42,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394340806] [2022-11-23 14:40:42,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:42,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:42,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:42,490 INFO L87 Difference]: Start difference. First operand 3191 states and 9251 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-11-23 14:40:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:42,593 INFO L93 Difference]: Finished difference Result 2789 states and 7875 transitions. [2022-11-23 14:40:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-23 14:40:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:42,605 INFO L225 Difference]: With dead ends: 2789 [2022-11-23 14:40:42,605 INFO L226 Difference]: Without dead ends: 2783 [2022-11-23 14:40:42,606 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 [2022-11-23 14:40:42,606 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:42,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 42 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2022-11-23 14:40:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2783. [2022-11-23 14:40:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2705 states have (on average 2.9046210720887244) internal successors, (7857), 2782 states have internal predecessors, (7857), 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) [2022-11-23 14:40:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7857 transitions. [2022-11-23 14:40:42,683 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7857 transitions. Word has length 9 [2022-11-23 14:40:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:42,684 INFO L495 AbstractCegarLoop]: Abstraction has 2783 states and 7857 transitions. [2022-11-23 14:40:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-11-23 14:40:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7857 transitions. [2022-11-23 14:40:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:40:42,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:42,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:42,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:40:42,686 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:42,686 INFO L85 PathProgramCache]: Analyzing trace with hash 465909063, now seen corresponding path program 1 times [2022-11-23 14:40:42,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:42,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204102270] [2022-11-23 14:40:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:42,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:42,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:42,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204102270] [2022-11-23 14:40:42,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204102270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:42,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:42,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:40:42,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335010064] [2022-11-23 14:40:42,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:42,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:40:42,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:42,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:40:42,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:40:42,824 INFO L87 Difference]: Start difference. First operand 2783 states and 7857 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-23 14:40:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:42,994 INFO L93 Difference]: Finished difference Result 3056 states and 8545 transitions. [2022-11-23 14:40:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:40:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2022-11-23 14:40:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:43,005 INFO L225 Difference]: With dead ends: 3056 [2022-11-23 14:40:43,006 INFO L226 Difference]: Without dead ends: 3047 [2022-11-23 14:40:43,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:40:43,006 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:43,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-11-23 14:40:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2771. [2022-11-23 14:40:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2694 states have (on average 2.910541945063103) internal successors, (7841), 2770 states have internal predecessors, (7841), 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) [2022-11-23 14:40:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 7841 transitions. [2022-11-23 14:40:43,073 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 7841 transitions. Word has length 11 [2022-11-23 14:40:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:43,074 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 7841 transitions. [2022-11-23 14:40:43,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-23 14:40:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 7841 transitions. [2022-11-23 14:40:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:40:43,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:43,075 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 14:40:43,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:40:43,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-23 14:40:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash 34803495, now seen corresponding path program 1 times [2022-11-23 14:40:43,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:43,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353950544] [2022-11-23 14:40:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:40:43,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:40:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:40:43,094 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:40:43,095 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:40:43,095 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2022-11-23 14:40:43,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2022-11-23 14:40:43,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2022-11-23 14:40:43,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2022-11-23 14:40:43,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2022-11-23 14:40:43,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (18 of 24 remaining) [2022-11-23 14:40:43,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2022-11-23 14:40:43,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2022-11-23 14:40:43,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2022-11-23 14:40:43,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2022-11-23 14:40:43,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2022-11-23 14:40:43,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2022-11-23 14:40:43,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (11 of 24 remaining) [2022-11-23 14:40:43,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (10 of 24 remaining) [2022-11-23 14:40:43,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2022-11-23 14:40:43,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2022-11-23 14:40:43,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2022-11-23 14:40:43,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 24 remaining) [2022-11-23 14:40:43,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (5 of 24 remaining) [2022-11-23 14:40:43,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2022-11-23 14:40:43,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2022-11-23 14:40:43,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2022-11-23 14:40:43,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2022-11-23 14:40:43,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 24 remaining) [2022-11-23 14:40:43,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:40:43,101 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:43,101 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:40:43,101 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 14:40:43,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:40:43,146 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:40:43,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 133 transitions, 287 flow [2022-11-23 14:40:43,147 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 133 transitions, 287 flow [2022-11-23 14:40:43,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 287 flow [2022-11-23 14:40:43,186 INFO L130 PetriNetUnfolder]: 18/278 cut-off events. [2022-11-23 14:40:43,186 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 14:40:43,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 278 events. 18/278 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 961 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2022-11-23 14:40:43,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 9072 [2022-11-23 14:40:45,591 INFO L134 LiptonReduction]: Checked pairs total: 40042 [2022-11-23 14:40:45,592 INFO L136 LiptonReduction]: Total number of compositions: 90 [2022-11-23 14:40:45,592 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 73 transitions, 167 flow [2022-11-23 14:40:47,863 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 70538 states, 67995 states have (on average 4.2625634237811605) internal successors, (289833), 70537 states have internal predecessors, (289833), 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) [2022-11-23 14:40:47,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:40:47,865 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;@585a6051, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:40:47,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2022-11-23 14:40:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 70538 states, 67995 states have (on average 4.2625634237811605) internal successors, (289833), 70537 states have internal predecessors, (289833), 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) [2022-11-23 14:40:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:40:47,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:47,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:40:47,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:40:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 28560, now seen corresponding path program 1 times [2022-11-23 14:40:47,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:47,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234345436] [2022-11-23 14:40:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:47,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:48,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:48,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234345436] [2022-11-23 14:40:48,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234345436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:48,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:48,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:40:48,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853057253] [2022-11-23 14:40:48,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:48,293 INFO L87 Difference]: Start difference. First operand has 70538 states, 67995 states have (on average 4.2625634237811605) internal successors, (289833), 70537 states have internal predecessors, (289833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:49,673 INFO L93 Difference]: Finished difference Result 75104 states and 288862 transitions. [2022-11-23 14:40:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:49,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 14:40:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:50,694 INFO L225 Difference]: With dead ends: 75104 [2022-11-23 14:40:50,694 INFO L226 Difference]: Without dead ends: 75104 [2022-11-23 14:40:50,694 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 [2022-11-23 14:40:50,696 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:50,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 38 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75104 states. [2022-11-23 14:40:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75104 to 69278. [2022-11-23 14:40:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69278 states, 66891 states have (on average 4.058647650655544) internal successors, (271487), 69277 states have internal predecessors, (271487), 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) [2022-11-23 14:40:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69278 states to 69278 states and 271487 transitions. [2022-11-23 14:40:54,341 INFO L78 Accepts]: Start accepts. Automaton has 69278 states and 271487 transitions. Word has length 2 [2022-11-23 14:40:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:54,341 INFO L495 AbstractCegarLoop]: Abstraction has 69278 states and 271487 transitions. [2022-11-23 14:40:54,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 69278 states and 271487 transitions. [2022-11-23 14:40:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:40:54,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:54,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:40:54,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:40:54,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:40:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash 28561, now seen corresponding path program 1 times [2022-11-23 14:40:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:54,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12751356] [2022-11-23 14:40:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:54,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:54,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12751356] [2022-11-23 14:40:54,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12751356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:54,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:54,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:40:54,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426709694] [2022-11-23 14:40:54,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:54,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:54,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:54,383 INFO L87 Difference]: Start difference. First operand 69278 states and 271487 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:55,579 INFO L93 Difference]: Finished difference Result 66323 states and 259530 transitions. [2022-11-23 14:40:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 14:40:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:55,949 INFO L225 Difference]: With dead ends: 66323 [2022-11-23 14:40:55,949 INFO L226 Difference]: Without dead ends: 66323 [2022-11-23 14:40:55,950 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 [2022-11-23 14:40:55,951 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:55,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66323 states. [2022-11-23 14:40:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66323 to 66323. [2022-11-23 14:40:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66323 states, 64195 states have (on average 4.042838227276268) internal successors, (259530), 66322 states have internal predecessors, (259530), 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) [2022-11-23 14:40:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66323 states to 66323 states and 259530 transitions. [2022-11-23 14:40:58,600 INFO L78 Accepts]: Start accepts. Automaton has 66323 states and 259530 transitions. Word has length 2 [2022-11-23 14:40:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:58,600 INFO L495 AbstractCegarLoop]: Abstraction has 66323 states and 259530 transitions. [2022-11-23 14:40:58,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-23 14:40:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 66323 states and 259530 transitions. [2022-11-23 14:40:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:40:58,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:58,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:40:58,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:40:58,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:40:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash 886478, now seen corresponding path program 1 times [2022-11-23 14:40:58,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:58,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328460330] [2022-11-23 14:40:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:40:58,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:58,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328460330] [2022-11-23 14:40:58,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328460330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:58,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:58,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:58,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328249603] [2022-11-23 14:40:58,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:58,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:58,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:58,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:58,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:58,642 INFO L87 Difference]: Start difference. First operand 66323 states and 259530 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:59,909 INFO L93 Difference]: Finished difference Result 67313 states and 257763 transitions. [2022-11-23 14:40:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:40:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:00,266 INFO L225 Difference]: With dead ends: 67313 [2022-11-23 14:41:00,266 INFO L226 Difference]: Without dead ends: 67313 [2022-11-23 14:41:00,267 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 [2022-11-23 14:41:00,267 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:00,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 51 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:41:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67313 states. [2022-11-23 14:41:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67313 to 62713. [2022-11-23 14:41:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62713 states, 60897 states have (on average 4.023465852176626) internal successors, (245017), 62712 states have internal predecessors, (245017), 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) [2022-11-23 14:41:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62713 states to 62713 states and 245017 transitions. [2022-11-23 14:41:03,200 INFO L78 Accepts]: Start accepts. Automaton has 62713 states and 245017 transitions. Word has length 3 [2022-11-23 14:41:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:03,200 INFO L495 AbstractCegarLoop]: Abstraction has 62713 states and 245017 transitions. [2022-11-23 14:41:03,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 62713 states and 245017 transitions. [2022-11-23 14:41:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:41:03,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:03,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:41:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 14:41:03,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:41:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash 886479, now seen corresponding path program 1 times [2022-11-23 14:41:03,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967093909] [2022-11-23 14:41:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:03,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:03,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967093909] [2022-11-23 14:41:03,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967093909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:03,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:03,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:41:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678865709] [2022-11-23 14:41:03,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:03,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:03,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:03,276 INFO L87 Difference]: Start difference. First operand 62713 states and 245017 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:04,562 INFO L93 Difference]: Finished difference Result 56803 states and 220681 transitions. [2022-11-23 14:41:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:41:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:04,821 INFO L225 Difference]: With dead ends: 56803 [2022-11-23 14:41:04,821 INFO L226 Difference]: Without dead ends: 56803 [2022-11-23 14:41:04,821 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 [2022-11-23 14:41:04,821 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:04,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56803 states. [2022-11-23 14:41:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56803 to 56803. [2022-11-23 14:41:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56803 states, 55505 states have (on average 3.975876047202955) internal successors, (220681), 56802 states have internal predecessors, (220681), 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) [2022-11-23 14:41:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56803 states to 56803 states and 220681 transitions. [2022-11-23 14:41:06,472 INFO L78 Accepts]: Start accepts. Automaton has 56803 states and 220681 transitions. Word has length 3 [2022-11-23 14:41:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:06,473 INFO L495 AbstractCegarLoop]: Abstraction has 56803 states and 220681 transitions. [2022-11-23 14:41:06,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 56803 states and 220681 transitions. [2022-11-23 14:41:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:41:06,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:06,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:41:06,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 14:41:06,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:41:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash 851658958, now seen corresponding path program 1 times [2022-11-23 14:41:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159910443] [2022-11-23 14:41:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:06,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:06,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159910443] [2022-11-23 14:41:06,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159910443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:06,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:06,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:41:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385701769] [2022-11-23 14:41:06,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:06,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:06,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:06,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:06,510 INFO L87 Difference]: Start difference. First operand 56803 states and 220681 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:41:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:07,759 INFO L93 Difference]: Finished difference Result 67927 states and 258425 transitions. [2022-11-23 14:41:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2022-11-23 14:41:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:08,036 INFO L225 Difference]: With dead ends: 67927 [2022-11-23 14:41:08,036 INFO L226 Difference]: Without dead ends: 67927 [2022-11-23 14:41:08,037 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 [2022-11-23 14:41:08,037 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:08,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 51 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67927 states. [2022-11-23 14:41:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67927 to 55269. [2022-11-23 14:41:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55269 states, 54083 states have (on average 4.013886064012721) internal successors, (217083), 55268 states have internal predecessors, (217083), 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) [2022-11-23 14:41:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55269 states to 55269 states and 217083 transitions. [2022-11-23 14:41:10,164 INFO L78 Accepts]: Start accepts. Automaton has 55269 states and 217083 transitions. Word has length 5 [2022-11-23 14:41:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:10,164 INFO L495 AbstractCegarLoop]: Abstraction has 55269 states and 217083 transitions. [2022-11-23 14:41:10,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:41:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 55269 states and 217083 transitions. [2022-11-23 14:41:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:41:10,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:10,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:41:10,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 14:41:10,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:41:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash 851658959, now seen corresponding path program 1 times [2022-11-23 14:41:10,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:10,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784557929] [2022-11-23 14:41:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:10,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:10,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:10,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784557929] [2022-11-23 14:41:10,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784557929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:10,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:10,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:41:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012115535] [2022-11-23 14:41:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:10,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:10,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:10,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:10,242 INFO L87 Difference]: Start difference. First operand 55269 states and 217083 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:41:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:11,468 INFO L93 Difference]: Finished difference Result 47343 states and 182971 transitions. [2022-11-23 14:41:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2022-11-23 14:41:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:11,744 INFO L225 Difference]: With dead ends: 47343 [2022-11-23 14:41:11,744 INFO L226 Difference]: Without dead ends: 47343 [2022-11-23 14:41:11,744 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 [2022-11-23 14:41:11,745 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:11,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 53 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47343 states. [2022-11-23 14:41:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47343 to 47343. [2022-11-23 14:41:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47343 states, 46559 states have (on average 3.929873923409008) internal successors, (182971), 47342 states have internal predecessors, (182971), 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) [2022-11-23 14:41:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47343 states to 47343 states and 182971 transitions. [2022-11-23 14:41:13,277 INFO L78 Accepts]: Start accepts. Automaton has 47343 states and 182971 transitions. Word has length 5 [2022-11-23 14:41:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:13,277 INFO L495 AbstractCegarLoop]: Abstraction has 47343 states and 182971 transitions. [2022-11-23 14:41:13,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-11-23 14:41:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 47343 states and 182971 transitions. [2022-11-23 14:41:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:41:13,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:13,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:41:13,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 14:41:13,278 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:41:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:13,279 INFO L85 PathProgramCache]: Analyzing trace with hash 640014694, now seen corresponding path program 1 times [2022-11-23 14:41:13,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:13,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301351066] [2022-11-23 14:41:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:13,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:13,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:13,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301351066] [2022-11-23 14:41:13,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301351066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:13,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:13,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:41:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650505238] [2022-11-23 14:41:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:13,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:13,357 INFO L87 Difference]: Start difference. First operand 47343 states and 182971 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) [2022-11-23 14:41:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:13,820 INFO L93 Difference]: Finished difference Result 57741 states and 217832 transitions. [2022-11-23 14:41:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:13,821 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 [2022-11-23 14:41:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:14,023 INFO L225 Difference]: With dead ends: 57741 [2022-11-23 14:41:14,023 INFO L226 Difference]: Without dead ends: 57587 [2022-11-23 14:41:14,023 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 [2022-11-23 14:41:14,025 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:14,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57587 states. [2022-11-23 14:41:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57587 to 51189. [2022-11-23 14:41:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51189 states, 50462 states have (on average 3.8514525781776388) internal successors, (194352), 51188 states have internal predecessors, (194352), 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) [2022-11-23 14:41:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51189 states to 51189 states and 194352 transitions. [2022-11-23 14:41:16,417 INFO L78 Accepts]: Start accepts. Automaton has 51189 states and 194352 transitions. Word has length 6 [2022-11-23 14:41:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:16,417 INFO L495 AbstractCegarLoop]: Abstraction has 51189 states and 194352 transitions. [2022-11-23 14:41:16,418 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) [2022-11-23 14:41:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 51189 states and 194352 transitions. [2022-11-23 14:41:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:41:16,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:16,418 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:16,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-23 14:41:16,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:41:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1861056608, now seen corresponding path program 1 times [2022-11-23 14:41:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783500741] [2022-11-23 14:41:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:16,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:41:16,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:16,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783500741] [2022-11-23 14:41:16,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783500741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:16,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:16,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:41:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727727715] [2022-11-23 14:41:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:16,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:16,478 INFO L87 Difference]: Start difference. First operand 51189 states and 194352 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-11-23 14:41:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:17,098 INFO L93 Difference]: Finished difference Result 64559 states and 241622 transitions. [2022-11-23 14:41:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-23 14:41:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:17,378 INFO L225 Difference]: With dead ends: 64559 [2022-11-23 14:41:17,378 INFO L226 Difference]: Without dead ends: 64559 [2022-11-23 14:41:17,379 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 [2022-11-23 14:41:17,379 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:17,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64559 states. [2022-11-23 14:41:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64559 to 51783. [2022-11-23 14:41:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51783 states, 51056 states have (on average 3.917737386399248) internal successors, (200024), 51782 states have internal predecessors, (200024), 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) [2022-11-23 14:41:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51783 states to 51783 states and 200024 transitions. [2022-11-23 14:41:19,284 INFO L78 Accepts]: Start accepts. Automaton has 51783 states and 200024 transitions. Word has length 9 [2022-11-23 14:41:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:19,284 INFO L495 AbstractCegarLoop]: Abstraction has 51783 states and 200024 transitions. [2022-11-23 14:41:19,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-11-23 14:41:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 51783 states and 200024 transitions. [2022-11-23 14:41:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:41:19,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:19,285 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:19,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-23 14:41:19,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-11-23 14:41:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1861056609, now seen corresponding path program 1 times [2022-11-23 14:41:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:19,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497307710] [2022-11-23 14:41:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:41:19,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:19,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497307710] [2022-11-23 14:41:19,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497307710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:19,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:19,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:41:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439081710] [2022-11-23 14:41:19,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:19,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:19,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:19,372 INFO L87 Difference]: Start difference. First operand 51783 states and 200024 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-11-23 14:41:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:20,404 INFO L93 Difference]: Finished difference Result 45209 states and 171104 transitions. [2022-11-23 14:41:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-23 14:41:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:20,555 INFO L225 Difference]: With dead ends: 45209 [2022-11-23 14:41:20,555 INFO L226 Difference]: Without dead ends: 45197 [2022-11-23 14:41:20,555 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 [2022-11-23 14:41:20,556 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:20,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 54 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45197 states.