./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh --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 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 --- 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-2329fc7 [2022-12-14 12:23:31,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:23:31,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:23:31,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:23:31,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:23:31,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:23:31,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:23:31,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:23:31,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:23:31,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:23:31,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:23:31,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:23:31,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:23:31,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:23:31,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:23:31,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:23:31,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:23:31,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:23:31,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:23:31,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:23:31,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:23:31,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:23:31,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:23:31,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:23:31,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:23:31,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:23:31,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:23:31,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:23:31,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:23:31,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:23:31,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:23:31,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:23:31,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:23:31,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:23:31,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:23:31,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:23:31,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:23:31,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:23:31,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:23:31,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:23:31,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:23:31,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 12:23:31,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:23:31,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:23:31,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:23:31,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:23:31,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:23:31,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:23:31,690 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:23:31,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:23:31,691 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:23:31,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:23:31,691 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:23:31,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:23:31,691 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:23:31,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:23:31,692 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:23:31,692 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:23:31,692 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:23:31,692 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:23:31,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:23:31,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:23:31,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:23:31,694 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:23:31,694 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:23:31,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:23:31,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:23:31,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:23:31,694 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:23:31,695 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:23:31,695 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 12:23:31,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:23:31,695 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:23:31,695 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:23:31,695 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:23:31,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:23:31,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:23:31,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:23:31,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:23:31,696 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:23:31,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:23:31,697 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:23:31,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:23:31,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:23:31,697 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_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 [2022-12-14 12:23:31,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:23:31,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:23:31,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:23:31,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:23:31,933 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:23:31,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i [2022-12-14 12:23:34,539 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:23:34,689 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:23:34,690 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/sv-benchmarks/c/pthread-ext/40_barrier_vf.i [2022-12-14 12:23:34,698 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/data/33a7694f2/a6f4867f135f4b29af2d320470e5029a/FLAGdd6c80c63 [2022-12-14 12:23:34,708 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/data/33a7694f2/a6f4867f135f4b29af2d320470e5029a [2022-12-14 12:23:34,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:23:34,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:23:34,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:23:34,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:23:34,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:23:34,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:23:34" (1/1) ... [2022-12-14 12:23:34,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63fa3378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:34, skipping insertion in model container [2022-12-14 12:23:34,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:23:34" (1/1) ... [2022-12-14 12:23:34,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:23:34,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:23:34,878 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 12:23:34,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:23:34,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:23:34,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:23:34,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:23:34,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:23:34,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:23:34,991 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_9c882392-d2e9-46e0-b388-67e7afa5f874/sv-benchmarks/c/pthread-ext/40_barrier_vf.i[31163,31176] [2022-12-14 12:23:34,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:23:35,007 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:23:35,019 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 12:23:35,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:23:35,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:23:35,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:23:35,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:23:35,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:23:35,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:23:35,045 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_9c882392-d2e9-46e0-b388-67e7afa5f874/sv-benchmarks/c/pthread-ext/40_barrier_vf.i[31163,31176] [2022-12-14 12:23:35,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:23:35,073 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:23:35,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35 WrapperNode [2022-12-14 12:23:35,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:23:35,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:23:35,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:23:35,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:23:35,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,111 INFO L138 Inliner]: procedures = 174, calls = 25, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 78 [2022-12-14 12:23:35,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:23:35,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:23:35,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:23:35,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:23:35,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:23:35,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:23:35,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:23:35,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:23:35,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (1/1) ... [2022-12-14 12:23:35,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:23:35,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:35,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:23:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c882392-d2e9-46e0-b388-67e7afa5f874/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:23:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 12:23:35,189 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 12:23:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:23:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 12:23:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:23:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:23:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:23:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:23:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 12:23:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:23:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:23:35,191 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 12:23:35,280 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:23:35,281 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:23:35,428 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:23:35,507 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:23:35,507 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:23:35,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:23:35 BoogieIcfgContainer [2022-12-14 12:23:35,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:23:35,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:23:35,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:23:35,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:23:35,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:23:34" (1/3) ... [2022-12-14 12:23:35,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f36caf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:23:35, skipping insertion in model container [2022-12-14 12:23:35,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:35" (2/3) ... [2022-12-14 12:23:35,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f36caf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:23:35, skipping insertion in model container [2022-12-14 12:23:35,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:23:35" (3/3) ... [2022-12-14 12:23:35,518 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf.i [2022-12-14 12:23:35,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:23:35,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-14 12:23:35,533 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 12:23:35,592 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:23:35,631 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:23:35,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 60 transitions, 125 flow [2022-12-14 12:23:35,647 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 60 transitions, 125 flow [2022-12-14 12:23:35,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 60 transitions, 125 flow [2022-12-14 12:23:35,681 INFO L130 PetriNetUnfolder]: 4/76 cut-off events. [2022-12-14 12:23:35,682 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 12:23:35,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 76 events. 4/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2022-12-14 12:23:35,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 874 [2022-12-14 12:23:37,332 INFO L134 LiptonReduction]: Checked pairs total: 781 [2022-12-14 12:23:37,332 INFO L136 LiptonReduction]: Total number of compositions: 62 [2022-12-14 12:23:37,340 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 11 transitions, 27 flow [2022-12-14 12:23:37,347 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 17 states have (on average 2.411764705882353) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:37,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:23:37,363 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;@19681eec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:23:37,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 12:23:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 2.411764705882353) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:37,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:37,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:37,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 12:23:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash 11792, now seen corresponding path program 1 times [2022-12-14 12:23:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851711090] [2022-12-14 12:23:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:37,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:37,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851711090] [2022-12-14 12:23:37,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851711090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:37,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:37,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:37,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060837906] [2022-12-14 12:23:37,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 12:23:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 12:23:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:23:37,499 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 2.411764705882353) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) 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) [2022-12-14 12:23:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:37,518 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2022-12-14 12:23:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 12:23:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 [2022-12-14 12:23:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:37,525 INFO L225 Difference]: With dead ends: 17 [2022-12-14 12:23:37,525 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 12:23:37,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:23:37,528 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:37,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 12:23:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 12:23:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.75) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 12:23:37,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 2 [2022-12-14 12:23:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:37,553 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 12:23:37,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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) [2022-12-14 12:23:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 12:23:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:37,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:37,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:37,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:23:37,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 12:23:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:37,554 INFO L85 PathProgramCache]: Analyzing trace with hash 11800, now seen corresponding path program 1 times [2022-12-14 12:23:37,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:37,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973835581] [2022-12-14 12:23:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:37,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:37,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973835581] [2022-12-14 12:23:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973835581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:37,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:37,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:37,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283674955] [2022-12-14 12:23:37,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:37,614 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2022-12-14 12:23:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:37,622 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2022-12-14 12:23:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:37,623 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 [2022-12-14 12:23:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:37,623 INFO L225 Difference]: With dead ends: 14 [2022-12-14 12:23:37,623 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 12:23:37,624 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 [2022-12-14 12:23:37,624 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:37,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 12:23:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 12:23:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-12-14 12:23:37,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 2 [2022-12-14 12:23:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:37,627 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-12-14 12:23:37,627 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) [2022-12-14 12:23:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-12-14 12:23:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:37,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:37,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:37,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:23:37,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 12:23:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 11801, now seen corresponding path program 1 times [2022-12-14 12:23:37,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998061737] [2022-12-14 12:23:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:37,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998061737] [2022-12-14 12:23:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998061737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:37,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572608877] [2022-12-14 12:23:37,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:37,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:37,689 INFO L87 Difference]: Start difference. First operand 14 states and 17 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) [2022-12-14 12:23:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:37,696 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2022-12-14 12:23:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:37,697 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 [2022-12-14 12:23:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:37,697 INFO L225 Difference]: With dead ends: 11 [2022-12-14 12:23:37,697 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 12:23:37,698 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 [2022-12-14 12:23:37,699 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:37,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 12:23:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 12:23:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-12-14 12:23:37,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 2 [2022-12-14 12:23:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:37,701 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-12-14 12:23:37,701 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) [2022-12-14 12:23:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-12-14 12:23:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 12:23:37,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:37,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 12:23:37,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:23:37,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 12:23:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash 11347892, now seen corresponding path program 1 times [2022-12-14 12:23:37,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:37,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944891493] [2022-12-14 12:23:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:37,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:37,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:37,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944891493] [2022-12-14 12:23:37,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944891493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:37,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:37,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:37,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682249318] [2022-12-14 12:23:37,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:37,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:37,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:37,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:37,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:37,803 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:37,809 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2022-12-14 12:23:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:37,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 12:23:37,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:37,810 INFO L225 Difference]: With dead ends: 7 [2022-12-14 12:23:37,810 INFO L226 Difference]: Without dead ends: 7 [2022-12-14 12:23:37,810 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 [2022-12-14 12:23:37,811 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:37,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-12-14 12:23:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-12-14 12:23:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 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) [2022-12-14 12:23:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-12-14 12:23:37,813 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 4 [2022-12-14 12:23:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:37,813 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-12-14 12:23:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-12-14 12:23:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:23:37,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:37,814 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 12:23:37,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:23:37,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-14 12:23:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:37,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1979619091, now seen corresponding path program 1 times [2022-12-14 12:23:37,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:37,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759163651] [2022-12-14 12:23:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:37,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:23:37,823 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:23:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:23:37,839 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:23:37,839 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:23:37,840 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-14 12:23:37,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2022-12-14 12:23:37,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-12-14 12:23:37,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-12-14 12:23:37,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2022-12-14 12:23:37,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-12-14 12:23:37,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:23:37,845 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-14 12:23:37,846 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 12:23:37,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 12:23:37,862 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:23:37,866 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:23:37,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 84 transitions, 180 flow [2022-12-14 12:23:37,866 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 84 transitions, 180 flow [2022-12-14 12:23:37,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 84 transitions, 180 flow [2022-12-14 12:23:37,889 INFO L130 PetriNetUnfolder]: 7/118 cut-off events. [2022-12-14 12:23:37,889 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 12:23:37,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 118 events. 7/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 273 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 77. Up to 6 conditions per place. [2022-12-14 12:23:37,895 INFO L119 LiptonReduction]: Number of co-enabled transitions 2852 [2022-12-14 12:23:38,919 INFO L134 LiptonReduction]: Checked pairs total: 9893 [2022-12-14 12:23:38,919 INFO L136 LiptonReduction]: Total number of compositions: 60 [2022-12-14 12:23:38,920 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 39 transitions, 90 flow [2022-12-14 12:23:38,979 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1880 states, 1851 states have (on average 2.874662344678552) internal successors, (5321), 1879 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:38,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:23:38,980 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;@19681eec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:23:38,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-14 12:23:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 1880 states, 1851 states have (on average 2.874662344678552) internal successors, (5321), 1879 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:38,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:38,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:38,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-14 12:23:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash 17305, now seen corresponding path program 1 times [2022-12-14 12:23:38,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:38,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538398425] [2022-12-14 12:23:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:39,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538398425] [2022-12-14 12:23:39,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538398425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:39,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:39,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138984691] [2022-12-14 12:23:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:39,011 INFO L87 Difference]: Start difference. First operand has 1880 states, 1851 states have (on average 2.874662344678552) internal successors, (5321), 1879 states have internal predecessors, (5321), 0 states have call successors, (0), 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) [2022-12-14 12:23:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:39,062 INFO L93 Difference]: Finished difference Result 1083 states and 3007 transitions. [2022-12-14 12:23:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:39,063 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 [2022-12-14 12:23:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:39,076 INFO L225 Difference]: With dead ends: 1083 [2022-12-14 12:23:39,076 INFO L226 Difference]: Without dead ends: 1083 [2022-12-14 12:23:39,076 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 [2022-12-14 12:23:39,077 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:39,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-12-14 12:23:39,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1083. [2022-12-14 12:23:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1079 states have (on average 2.786839666357739) internal successors, (3007), 1082 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 3007 transitions. [2022-12-14 12:23:39,124 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 3007 transitions. Word has length 2 [2022-12-14 12:23:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:39,124 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 3007 transitions. [2022-12-14 12:23:39,125 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) [2022-12-14 12:23:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 3007 transitions. [2022-12-14 12:23:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:39,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:39,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:39,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:23:39,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-14 12:23:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash 17306, now seen corresponding path program 1 times [2022-12-14 12:23:39,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:39,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339751045] [2022-12-14 12:23:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:39,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:39,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339751045] [2022-12-14 12:23:39,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339751045] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:39,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:39,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982210085] [2022-12-14 12:23:39,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:39,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:39,157 INFO L87 Difference]: Start difference. First operand 1083 states and 3007 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) [2022-12-14 12:23:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:39,187 INFO L93 Difference]: Finished difference Result 900 states and 2473 transitions. [2022-12-14 12:23:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:39,187 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 [2022-12-14 12:23:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:39,190 INFO L225 Difference]: With dead ends: 900 [2022-12-14 12:23:39,191 INFO L226 Difference]: Without dead ends: 900 [2022-12-14 12:23:39,191 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 [2022-12-14 12:23:39,191 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:39,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 13 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-12-14 12:23:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 900. [2022-12-14 12:23:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.7508342602892104) internal successors, (2473), 899 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2473 transitions. [2022-12-14 12:23:39,212 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2473 transitions. Word has length 2 [2022-12-14 12:23:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:39,212 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2473 transitions. [2022-12-14 12:23:39,213 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) [2022-12-14 12:23:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2473 transitions. [2022-12-14 12:23:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:23:39,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:39,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:39,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:23:39,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-14 12:23:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:39,214 INFO L85 PathProgramCache]: Analyzing trace with hash -176624530, now seen corresponding path program 1 times [2022-12-14 12:23:39,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:39,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312226987] [2022-12-14 12:23:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:39,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:39,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:39,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312226987] [2022-12-14 12:23:39,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312226987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:39,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:39,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823365667] [2022-12-14 12:23:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:39,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:39,281 INFO L87 Difference]: Start difference. First operand 900 states and 2473 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-12-14 12:23:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:39,413 INFO L93 Difference]: Finished difference Result 1692 states and 4513 transitions. [2022-12-14 12:23:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:23:39,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-12-14 12:23:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:39,419 INFO L225 Difference]: With dead ends: 1692 [2022-12-14 12:23:39,419 INFO L226 Difference]: Without dead ends: 1692 [2022-12-14 12:23:39,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:39,420 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:39,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 63 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:39,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-12-14 12:23:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1027. [2022-12-14 12:23:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 2.7251461988304095) internal successors, (2796), 1026 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 2796 transitions. [2022-12-14 12:23:39,445 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 2796 transitions. Word has length 11 [2022-12-14 12:23:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:39,445 INFO L495 AbstractCegarLoop]: Abstraction has 1027 states and 2796 transitions. [2022-12-14 12:23:39,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-12-14 12:23:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 2796 transitions. [2022-12-14 12:23:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:23:39,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:39,446 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 12:23:39,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:23:39,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-14 12:23:39,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:39,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1925349094, now seen corresponding path program 1 times [2022-12-14 12:23:39,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:39,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687555069] [2022-12-14 12:23:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:39,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:23:39,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:23:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:23:39,460 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:23:39,460 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:23:39,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-14 12:23:39,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2022-12-14 12:23:39,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-14 12:23:39,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-14 12:23:39,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2022-12-14 12:23:39,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-14 12:23:39,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-14 12:23:39,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:23:39,461 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-14 12:23:39,461 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 12:23:39,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 12:23:39,476 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:23:39,478 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:23:39,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 108 transitions, 237 flow [2022-12-14 12:23:39,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 108 transitions, 237 flow [2022-12-14 12:23:39,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 108 transitions, 237 flow [2022-12-14 12:23:39,494 INFO L130 PetriNetUnfolder]: 10/160 cut-off events. [2022-12-14 12:23:39,494 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 12:23:39,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 160 events. 10/160 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 444 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 122. Up to 8 conditions per place. [2022-12-14 12:23:39,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 5934 [2022-12-14 12:23:40,462 INFO L134 LiptonReduction]: Checked pairs total: 23208 [2022-12-14 12:23:40,463 INFO L136 LiptonReduction]: Total number of compositions: 73 [2022-12-14 12:23:40,464 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 54 transitions, 129 flow [2022-12-14 12:23:40,995 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26379 states, 26315 states have (on average 3.8367851035531064) internal successors, (100965), 26378 states have internal predecessors, (100965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:40,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:23:40,996 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;@19681eec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:23:40,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-14 12:23:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 26379 states, 26315 states have (on average 3.8367851035531064) internal successors, (100965), 26378 states have internal predecessors, (100965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:41,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:41,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:41,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 12:23:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 23862, now seen corresponding path program 1 times [2022-12-14 12:23:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325058251] [2022-12-14 12:23:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:41,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:41,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:41,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325058251] [2022-12-14 12:23:41,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325058251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:41,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:41,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365097504] [2022-12-14 12:23:41,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:41,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:41,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:41,118 INFO L87 Difference]: Start difference. First operand has 26379 states, 26315 states have (on average 3.8367851035531064) internal successors, (100965), 26378 states have internal predecessors, (100965), 0 states have call successors, (0), 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) [2022-12-14 12:23:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:41,428 INFO L93 Difference]: Finished difference Result 14096 states and 53200 transitions. [2022-12-14 12:23:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:41,429 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 [2022-12-14 12:23:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:41,515 INFO L225 Difference]: With dead ends: 14096 [2022-12-14 12:23:41,515 INFO L226 Difference]: Without dead ends: 14096 [2022-12-14 12:23:41,515 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 [2022-12-14 12:23:41,516 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:41,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 19 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14096 states. [2022-12-14 12:23:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14096 to 14096. [2022-12-14 12:23:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14096 states, 14091 states have (on average 3.775459513164431) internal successors, (53200), 14095 states have internal predecessors, (53200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14096 states to 14096 states and 53200 transitions. [2022-12-14 12:23:42,030 INFO L78 Accepts]: Start accepts. Automaton has 14096 states and 53200 transitions. Word has length 2 [2022-12-14 12:23:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:42,031 INFO L495 AbstractCegarLoop]: Abstraction has 14096 states and 53200 transitions. [2022-12-14 12:23:42,031 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) [2022-12-14 12:23:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 14096 states and 53200 transitions. [2022-12-14 12:23:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:42,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:42,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:42,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:23:42,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 12:23:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash 23863, now seen corresponding path program 1 times [2022-12-14 12:23:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:42,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452901145] [2022-12-14 12:23:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:42,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:42,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452901145] [2022-12-14 12:23:42,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452901145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:42,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:42,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:42,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532926173] [2022-12-14 12:23:42,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:42,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:42,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:42,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:42,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:42,054 INFO L87 Difference]: Start difference. First operand 14096 states and 53200 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) [2022-12-14 12:23:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:42,181 INFO L93 Difference]: Finished difference Result 11716 states and 43878 transitions. [2022-12-14 12:23:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:42,182 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 [2022-12-14 12:23:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:42,263 INFO L225 Difference]: With dead ends: 11716 [2022-12-14 12:23:42,263 INFO L226 Difference]: Without dead ends: 11716 [2022-12-14 12:23:42,264 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 [2022-12-14 12:23:42,264 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:42,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11716 states. [2022-12-14 12:23:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11716 to 11716. [2022-12-14 12:23:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11716 states, 11715 states have (on average 3.7454545454545456) internal successors, (43878), 11715 states have internal predecessors, (43878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11716 states to 11716 states and 43878 transitions. [2022-12-14 12:23:42,639 INFO L78 Accepts]: Start accepts. Automaton has 11716 states and 43878 transitions. Word has length 2 [2022-12-14 12:23:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:42,640 INFO L495 AbstractCegarLoop]: Abstraction has 11716 states and 43878 transitions. [2022-12-14 12:23:42,640 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) [2022-12-14 12:23:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 11716 states and 43878 transitions. [2022-12-14 12:23:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:23:42,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:42,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:23:42,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 12:23:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2130428900, now seen corresponding path program 1 times [2022-12-14 12:23:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696771] [2022-12-14 12:23:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:42,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:42,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696771] [2022-12-14 12:23:42,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:42,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:42,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:42,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727941550] [2022-12-14 12:23:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:42,693 INFO L87 Difference]: Start difference. First operand 11716 states and 43878 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-12-14 12:23:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:43,114 INFO L93 Difference]: Finished difference Result 26798 states and 96709 transitions. [2022-12-14 12:23:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:23:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-12-14 12:23:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:43,212 INFO L225 Difference]: With dead ends: 26798 [2022-12-14 12:23:43,212 INFO L226 Difference]: Without dead ends: 26798 [2022-12-14 12:23:43,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:43,212 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 159 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:43,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 111 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26798 states. [2022-12-14 12:23:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26798 to 15011. [2022-12-14 12:23:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15011 states, 15010 states have (on average 3.705862758161226) internal successors, (55625), 15010 states have internal predecessors, (55625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15011 states to 15011 states and 55625 transitions. [2022-12-14 12:23:43,697 INFO L78 Accepts]: Start accepts. Automaton has 15011 states and 55625 transitions. Word has length 11 [2022-12-14 12:23:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:43,697 INFO L495 AbstractCegarLoop]: Abstraction has 15011 states and 55625 transitions. [2022-12-14 12:23:43,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-12-14 12:23:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15011 states and 55625 transitions. [2022-12-14 12:23:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:23:43,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:43,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:43,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:23:43,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 12:23:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:43,699 INFO L85 PathProgramCache]: Analyzing trace with hash 499271741, now seen corresponding path program 1 times [2022-12-14 12:23:43,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:43,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766426516] [2022-12-14 12:23:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:43,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:43,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:43,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766426516] [2022-12-14 12:23:43,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766426516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:43,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:43,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:23:43,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823700142] [2022-12-14 12:23:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:43,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:43,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:43,785 INFO L87 Difference]: Start difference. First operand 15011 states and 55625 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:43,949 INFO L93 Difference]: Finished difference Result 14587 states and 51072 transitions. [2022-12-14 12:23:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:43,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-12-14 12:23:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:44,013 INFO L225 Difference]: With dead ends: 14587 [2022-12-14 12:23:44,014 INFO L226 Difference]: Without dead ends: 14587 [2022-12-14 12:23:44,014 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 [2022-12-14 12:23:44,015 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:44,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14587 states. [2022-12-14 12:23:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14587 to 13582. [2022-12-14 12:23:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13582 states, 13577 states have (on average 3.524563600206231) internal successors, (47853), 13581 states have internal predecessors, (47853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13582 states to 13582 states and 47853 transitions. [2022-12-14 12:23:44,521 INFO L78 Accepts]: Start accepts. Automaton has 13582 states and 47853 transitions. Word has length 13 [2022-12-14 12:23:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:44,521 INFO L495 AbstractCegarLoop]: Abstraction has 13582 states and 47853 transitions. [2022-12-14 12:23:44,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 13582 states and 47853 transitions. [2022-12-14 12:23:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:23:44,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:44,523 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 12:23:44,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 12:23:44,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 12:23:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1314292917, now seen corresponding path program 1 times [2022-12-14 12:23:44,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:44,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934473990] [2022-12-14 12:23:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:23:44,534 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:23:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:23:44,545 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:23:44,545 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:23:44,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-12-14 12:23:44,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2022-12-14 12:23:44,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-12-14 12:23:44,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-12-14 12:23:44,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2022-12-14 12:23:44,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2022-12-14 12:23:44,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2022-12-14 12:23:44,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-12-14 12:23:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 12:23:44,546 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-14 12:23:44,547 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 12:23:44,547 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 12:23:44,566 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 12:23:44,569 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:23:44,569 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 132 transitions, 296 flow [2022-12-14 12:23:44,569 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 132 transitions, 296 flow [2022-12-14 12:23:44,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 132 transitions, 296 flow [2022-12-14 12:23:44,602 INFO L130 PetriNetUnfolder]: 13/202 cut-off events. [2022-12-14 12:23:44,602 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-14 12:23:44,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 202 events. 13/202 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 625 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 168. Up to 10 conditions per place. [2022-12-14 12:23:44,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 10120 [2022-12-14 12:23:45,677 INFO L134 LiptonReduction]: Checked pairs total: 42047 [2022-12-14 12:23:45,677 INFO L136 LiptonReduction]: Total number of compositions: 86 [2022-12-14 12:23:45,677 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 74 places, 69 transitions, 170 flow [2022-12-14 12:23:53,313 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 369378 states, 369243 states have (on average 4.828885043182945) internal successors, (1783032), 369377 states have internal predecessors, (1783032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:53,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:23:53,314 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;@19681eec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:23:53,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-14 12:23:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 369378 states, 369243 states have (on average 4.828885043182945) internal successors, (1783032), 369377 states have internal predecessors, (1783032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:23:53,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:53,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:23:53,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:23:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 31603, now seen corresponding path program 1 times [2022-12-14 12:23:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:53,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574428542] [2022-12-14 12:23:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:53,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:53,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:53,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574428542] [2022-12-14 12:23:53,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574428542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:53,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:53,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:53,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537968675] [2022-12-14 12:23:53,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:53,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:54,309 INFO L87 Difference]: Start difference. First operand has 369378 states, 369243 states have (on average 4.828885043182945) internal successors, (1783032), 369377 states have internal predecessors, (1783032), 0 states have call successors, (0), 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) [2022-12-14 12:23:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:56,561 INFO L93 Difference]: Finished difference Result 183265 states and 874878 transitions. [2022-12-14 12:23:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:56,562 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 [2022-12-14 12:23:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:57,861 INFO L225 Difference]: With dead ends: 183265 [2022-12-14 12:23:57,861 INFO L226 Difference]: Without dead ends: 183265 [2022-12-14 12:23:57,861 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 [2022-12-14 12:23:57,862 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:57,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 25 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183265 states. [2022-12-14 12:24:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183265 to 183265. [2022-12-14 12:24:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183265 states, 183259 states have (on average 4.773997457150808) internal successors, (874878), 183264 states have internal predecessors, (874878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183265 states to 183265 states and 874878 transitions. [2022-12-14 12:24:04,599 INFO L78 Accepts]: Start accepts. Automaton has 183265 states and 874878 transitions. Word has length 2 [2022-12-14 12:24:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:04,600 INFO L495 AbstractCegarLoop]: Abstraction has 183265 states and 874878 transitions. [2022-12-14 12:24:04,600 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) [2022-12-14 12:24:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 183265 states and 874878 transitions. [2022-12-14 12:24:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:24:04,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:04,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:24:04,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 12:24:04,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:24:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash 31602, now seen corresponding path program 1 times [2022-12-14 12:24:04,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:04,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923617286] [2022-12-14 12:24:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:04,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:04,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:04,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923617286] [2022-12-14 12:24:04,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923617286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:24:04,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:24:04,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:24:04,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109399653] [2022-12-14 12:24:04,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:24:04,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:24:04,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:24:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:24:04,622 INFO L87 Difference]: Start difference. First operand 183265 states and 874878 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) [2022-12-14 12:24:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:06,339 INFO L93 Difference]: Finished difference Result 152324 states and 722751 transitions. [2022-12-14 12:24:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:24:06,340 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 [2022-12-14 12:24:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:07,235 INFO L225 Difference]: With dead ends: 152324 [2022-12-14 12:24:07,235 INFO L226 Difference]: Without dead ends: 152324 [2022-12-14 12:24:07,235 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 [2022-12-14 12:24:07,236 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:07,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:24:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152324 states. [2022-12-14 12:24:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152324 to 152324. [2022-12-14 12:24:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152324 states, 152323 states have (on average 4.7448579662953065) internal successors, (722751), 152323 states have internal predecessors, (722751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152324 states to 152324 states and 722751 transitions. [2022-12-14 12:24:12,710 INFO L78 Accepts]: Start accepts. Automaton has 152324 states and 722751 transitions. Word has length 2 [2022-12-14 12:24:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:12,710 INFO L495 AbstractCegarLoop]: Abstraction has 152324 states and 722751 transitions. [2022-12-14 12:24:12,710 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) [2022-12-14 12:24:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 152324 states and 722751 transitions. [2022-12-14 12:24:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:24:12,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:12,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:12,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 12:24:12,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:24:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1776409361, now seen corresponding path program 1 times [2022-12-14 12:24:12,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:12,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80667016] [2022-12-14 12:24:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:12,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80667016] [2022-12-14 12:24:12,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80667016] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:24:12,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:24:12,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:24:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689552688] [2022-12-14 12:24:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:24:12,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:24:12,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:24:12,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:24:12,769 INFO L87 Difference]: Start difference. First operand 152324 states and 722751 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-12-14 12:24:16,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:16,956 INFO L93 Difference]: Finished difference Result 377116 states and 1718869 transitions. [2022-12-14 12:24:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:24:16,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-12-14 12:24:16,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:19,691 INFO L225 Difference]: With dead ends: 377116 [2022-12-14 12:24:19,692 INFO L226 Difference]: Without dead ends: 377116 [2022-12-14 12:24:19,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:24:19,692 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 218 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:19,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 151 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:24:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377116 states. [2022-12-14 12:24:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377116 to 208755. [2022-12-14 12:24:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208755 states, 208754 states have (on average 4.6783534686760495) internal successors, (976625), 208754 states have internal predecessors, (976625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208755 states to 208755 states and 976625 transitions. [2022-12-14 12:24:29,134 INFO L78 Accepts]: Start accepts. Automaton has 208755 states and 976625 transitions. Word has length 11 [2022-12-14 12:24:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:29,135 INFO L495 AbstractCegarLoop]: Abstraction has 208755 states and 976625 transitions. [2022-12-14 12:24:29,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-12-14 12:24:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 208755 states and 976625 transitions. [2022-12-14 12:24:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:24:29,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:29,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:29,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 12:24:29,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:24:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1110335662, now seen corresponding path program 1 times [2022-12-14 12:24:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:29,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667115190] [2022-12-14 12:24:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:29,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667115190] [2022-12-14 12:24:29,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667115190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:24:29,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:24:29,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:24:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129479440] [2022-12-14 12:24:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:24:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:24:29,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:24:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:24:29,198 INFO L87 Difference]: Start difference. First operand 208755 states and 976625 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:31,600 INFO L93 Difference]: Finished difference Result 240459 states and 1067076 transitions. [2022-12-14 12:24:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:24:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-12-14 12:24:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:33,242 INFO L225 Difference]: With dead ends: 240459 [2022-12-14 12:24:33,242 INFO L226 Difference]: Without dead ends: 240459 [2022-12-14 12:24:33,243 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 [2022-12-14 12:24:33,243 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:33,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:24:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240459 states. [2022-12-14 12:24:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240459 to 231184. [2022-12-14 12:24:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231184 states, 231172 states have (on average 4.45069472081394) internal successors, (1028876), 231183 states have internal predecessors, (1028876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231184 states to 231184 states and 1028876 transitions. [2022-12-14 12:24:41,053 INFO L78 Accepts]: Start accepts. Automaton has 231184 states and 1028876 transitions. Word has length 13 [2022-12-14 12:24:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:41,053 INFO L495 AbstractCegarLoop]: Abstraction has 231184 states and 1028876 transitions. [2022-12-14 12:24:41,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 231184 states and 1028876 transitions. [2022-12-14 12:24:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:24:41,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:41,055 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:41,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 12:24:41,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:24:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2065772762, now seen corresponding path program 1 times [2022-12-14 12:24:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:41,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318471889] [2022-12-14 12:24:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:41,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:24:41,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:41,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318471889] [2022-12-14 12:24:41,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318471889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:24:41,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:24:41,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:24:41,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229062490] [2022-12-14 12:24:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:24:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:24:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:24:41,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:24:41,109 INFO L87 Difference]: Start difference. First operand 231184 states and 1028876 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:45,173 INFO L93 Difference]: Finished difference Result 423016 states and 1827037 transitions. [2022-12-14 12:24:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:24:45,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 15 [2022-12-14 12:24:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:47,937 INFO L225 Difference]: With dead ends: 423016 [2022-12-14 12:24:47,937 INFO L226 Difference]: Without dead ends: 423016 [2022-12-14 12:24:47,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:24:47,937 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 183 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:47,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 127 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:24:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423016 states.