./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/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_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/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_c8975f86-9ae7-4abb-bce4-3b18c87844d4/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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:52:46,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:52:46,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:52:46,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:52:46,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:52:46,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:52:46,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:52:46,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:52:46,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:52:46,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:52:46,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:52:46,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:52:46,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:52:46,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:52:46,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:52:46,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:52:46,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:52:46,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:52:46,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:52:46,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:52:46,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:52:46,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:52:46,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:52:46,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:52:46,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:52:46,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:52:46,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:52:46,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:52:46,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:52:46,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:52:46,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:52:46,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:52:46,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:52:46,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:52:46,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:52:46,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:52:46,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:52:46,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:52:46,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:52:46,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:52:46,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:52:46,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:52:46,337 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:52:46,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:52:46,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:52:46,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:52:46,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:52:46,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:52:46,344 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:52:46,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:52:46,344 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:52:46,344 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:52:46,345 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:52:46,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:52:46,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:52:46,345 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:52:46,345 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:52:46,345 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:52:46,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:52:46,346 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:52:46,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:52:46,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:52:46,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:52:46,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:52:46,347 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:52:46,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:52:46,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:52:46,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:52:46,348 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:52:46,348 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:52:46,348 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:52:46,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:52:46,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:52:46,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:52:46,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:52:46,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:52:46,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:52:46,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:52:46,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:52:46,349 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:52:46,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:52:46,350 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:52:46,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:52:46,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:52:46,350 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_c8975f86-9ae7-4abb-bce4-3b18c87844d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2022-12-14 07:52:46,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:52:46,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:52:46,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:52:46,548 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:52:46,549 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:52:46,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-12-14 07:52:49,199 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:52:49,345 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:52:49,345 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-12-14 07:52:49,355 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/data/8fba60c02/8e5ef4e82f684294b0eb9d1cef6dca70/FLAG90fe5650e [2022-12-14 07:52:49,365 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/data/8fba60c02/8e5ef4e82f684294b0eb9d1cef6dca70 [2022-12-14 07:52:49,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:52:49,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:52:49,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:52:49,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:52:49,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:52:49,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6afa7837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49, skipping insertion in model container [2022-12-14 07:52:49,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:52:49,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:52:49,518 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 07:52:49,600 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:52:49,602 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:52:49,602 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_c8975f86-9ae7-4abb-bce4-3b18c87844d4/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-12-14 07:52:49,605 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:52:49,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:52:49,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:52:49,616 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:52:49,627 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 07:52:49,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:52:49,642 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:52:49,642 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_c8975f86-9ae7-4abb-bce4-3b18c87844d4/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-12-14 07:52:49,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:52:49,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:52:49,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:52:49,665 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:52:49,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49 WrapperNode [2022-12-14 07:52:49,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:52:49,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:52:49,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:52:49,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:52:49,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,694 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-12-14 07:52:49,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:52:49,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:52:49,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:52:49,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:52:49,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,711 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:52:49,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:52:49,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:52:49,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:52:49,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (1/1) ... [2022-12-14 07:52:49,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:52:49,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:52:49,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:52:49,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8975f86-9ae7-4abb-bce4-3b18c87844d4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 07:52:49,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:52:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:52:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:52:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:52:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:52:49,767 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 07:52:49,864 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:52:49,866 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:52:50,039 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:52:50,128 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:52:50,128 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:52:50,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:52:50 BoogieIcfgContainer [2022-12-14 07:52:50,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:52:50,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:52:50,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:52:50,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:52:50,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:52:49" (1/3) ... [2022-12-14 07:52:50,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eea3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:52:50, skipping insertion in model container [2022-12-14 07:52:50,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:52:49" (2/3) ... [2022-12-14 07:52:50,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eea3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:52:50, skipping insertion in model container [2022-12-14 07:52:50,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:52:50" (3/3) ... [2022-12-14 07:52:50,138 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2022-12-14 07:52:50,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:52:50,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-14 07:52:50,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:52:50,217 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:52:50,247 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:52:50,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 89 transitions, 183 flow [2022-12-14 07:52:50,264 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 89 transitions, 183 flow [2022-12-14 07:52:50,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 89 transitions, 183 flow [2022-12-14 07:52:50,314 INFO L130 PetriNetUnfolder]: 8/136 cut-off events. [2022-12-14 07:52:50,315 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 07:52:50,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 136 events. 8/136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 307 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2022-12-14 07:52:50,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 2100 [2022-12-14 07:52:51,631 INFO L134 LiptonReduction]: Checked pairs total: 7193 [2022-12-14 07:52:51,631 INFO L136 LiptonReduction]: Total number of compositions: 71 [2022-12-14 07:52:51,637 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 41 transitions, 87 flow [2022-12-14 07:52:51,664 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 334 states, 267 states have (on average 2.5655430711610485) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:51,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:52:51,681 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;@76da2a1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:52:51,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-12-14 07:52:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 334 states, 267 states have (on average 2.5655430711610485) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:52:51,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:51,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:52:51,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:51,690 INFO L85 PathProgramCache]: Analyzing trace with hash 13912, now seen corresponding path program 1 times [2022-12-14 07:52:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:51,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186556219] [2022-12-14 07:52:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:51,853 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 07:52:51,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:51,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186556219] [2022-12-14 07:52:51,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186556219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:51,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:51,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:52:51,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061612859] [2022-12-14 07:52:51,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:51,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:51,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:51,883 INFO L87 Difference]: Start difference. First operand has 334 states, 267 states have (on average 2.5655430711610485) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:51,974 INFO L93 Difference]: Finished difference Result 322 states and 622 transitions. [2022-12-14 07:52:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:51,976 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 07:52:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:51,983 INFO L225 Difference]: With dead ends: 322 [2022-12-14 07:52:51,984 INFO L226 Difference]: Without dead ends: 322 [2022-12-14 07:52:51,984 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 07:52:51,986 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:51,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 20 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-12-14 07:52:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2022-12-14 07:52:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 259 states have (on average 2.3976833976833976) internal successors, (621), 319 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 621 transitions. [2022-12-14 07:52:52,023 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 621 transitions. Word has length 2 [2022-12-14 07:52:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:52,023 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 621 transitions. [2022-12-14 07:52:52,023 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 07:52:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 621 transitions. [2022-12-14 07:52:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:52:52,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:52,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:52:52,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:52:52,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash 13913, now seen corresponding path program 1 times [2022-12-14 07:52:52,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:52,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552627552] [2022-12-14 07:52:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:52,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:52,096 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 07:52:52,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:52,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552627552] [2022-12-14 07:52:52,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552627552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:52,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:52,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:52:52,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447228982] [2022-12-14 07:52:52,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:52,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:52,099 INFO L87 Difference]: Start difference. First operand 320 states and 621 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:52,142 INFO L93 Difference]: Finished difference Result 305 states and 592 transitions. [2022-12-14 07:52:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:52,142 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 07:52:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:52,143 INFO L225 Difference]: With dead ends: 305 [2022-12-14 07:52:52,143 INFO L226 Difference]: Without dead ends: 305 [2022-12-14 07:52:52,144 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 07:52:52,144 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:52,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:52:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-12-14 07:52:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-12-14 07:52:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 251 states have (on average 2.358565737051793) internal successors, (592), 304 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 592 transitions. [2022-12-14 07:52:52,160 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 592 transitions. Word has length 2 [2022-12-14 07:52:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:52,160 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 592 transitions. [2022-12-14 07:52:52,160 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 07:52:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 592 transitions. [2022-12-14 07:52:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:52:52,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:52,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:52:52,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:52:52,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash 431744, now seen corresponding path program 1 times [2022-12-14 07:52:52,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:52,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441201216] [2022-12-14 07:52:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:52,232 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 07:52:52,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441201216] [2022-12-14 07:52:52,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441201216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:52,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:52,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:52,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956174360] [2022-12-14 07:52:52,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:52,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:52,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:52,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:52,234 INFO L87 Difference]: Start difference. First operand 305 states and 592 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:52,293 INFO L93 Difference]: Finished difference Result 287 states and 547 transitions. [2022-12-14 07:52:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:52,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:52:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:52,295 INFO L225 Difference]: With dead ends: 287 [2022-12-14 07:52:52,295 INFO L226 Difference]: Without dead ends: 287 [2022-12-14 07:52:52,296 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 07:52:52,297 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:52,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-14 07:52:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 279. [2022-12-14 07:52:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 237 states have (on average 2.282700421940928) internal successors, (541), 278 states have internal predecessors, (541), 0 states have call successors, (0), 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 07:52:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 541 transitions. [2022-12-14 07:52:52,305 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 541 transitions. Word has length 3 [2022-12-14 07:52:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:52,306 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 541 transitions. [2022-12-14 07:52:52,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 541 transitions. [2022-12-14 07:52:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:52:52,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:52,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:52:52,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:52:52,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash 431745, now seen corresponding path program 1 times [2022-12-14 07:52:52,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:52,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565836094] [2022-12-14 07:52:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:52,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:52,375 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 07:52:52,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:52,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565836094] [2022-12-14 07:52:52,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565836094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:52,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:52,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:52,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136023531] [2022-12-14 07:52:52,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:52,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:52,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:52,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:52,377 INFO L87 Difference]: Start difference. First operand 279 states and 541 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:52,424 INFO L93 Difference]: Finished difference Result 249 states and 481 transitions. [2022-12-14 07:52:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:52,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:52:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:52,426 INFO L225 Difference]: With dead ends: 249 [2022-12-14 07:52:52,426 INFO L226 Difference]: Without dead ends: 249 [2022-12-14 07:52:52,426 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 07:52:52,427 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:52,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:52:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-12-14 07:52:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-12-14 07:52:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 221 states have (on average 2.176470588235294) internal successors, (481), 248 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 481 transitions. [2022-12-14 07:52:52,436 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 481 transitions. Word has length 3 [2022-12-14 07:52:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:52,436 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 481 transitions. [2022-12-14 07:52:52,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 481 transitions. [2022-12-14 07:52:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:52:52,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:52,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:52:52,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:52:52,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:52,438 INFO L85 PathProgramCache]: Analyzing trace with hash 414754460, now seen corresponding path program 1 times [2022-12-14 07:52:52,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:52,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823310530] [2022-12-14 07:52:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:52,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:52,491 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 07:52:52,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:52,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823310530] [2022-12-14 07:52:52,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823310530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:52,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:52,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:52,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634819292] [2022-12-14 07:52:52,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:52,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:52,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:52,493 INFO L87 Difference]: Start difference. First operand 249 states and 481 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:52,557 INFO L93 Difference]: Finished difference Result 269 states and 512 transitions. [2022-12-14 07:52:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:52:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:52,559 INFO L225 Difference]: With dead ends: 269 [2022-12-14 07:52:52,559 INFO L226 Difference]: Without dead ends: 269 [2022-12-14 07:52:52,560 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 07:52:52,560 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-12-14 07:52:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 235. [2022-12-14 07:52:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 211 states have (on average 2.199052132701422) internal successors, (464), 234 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 464 transitions. [2022-12-14 07:52:52,568 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 464 transitions. Word has length 5 [2022-12-14 07:52:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:52,569 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 464 transitions. [2022-12-14 07:52:52,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,569 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 464 transitions. [2022-12-14 07:52:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:52:52,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:52,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:52:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:52:52,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:52,570 INFO L85 PathProgramCache]: Analyzing trace with hash 414754461, now seen corresponding path program 1 times [2022-12-14 07:52:52,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:52,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497431982] [2022-12-14 07:52:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:52,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:52,648 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 07:52:52,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:52,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497431982] [2022-12-14 07:52:52,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497431982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:52,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:52,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102065009] [2022-12-14 07:52:52,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:52,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:52,651 INFO L87 Difference]: Start difference. First operand 235 states and 464 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:52,686 INFO L93 Difference]: Finished difference Result 201 states and 386 transitions. [2022-12-14 07:52:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:52,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:52:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:52,688 INFO L225 Difference]: With dead ends: 201 [2022-12-14 07:52:52,688 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 07:52:52,688 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 07:52:52,689 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:52,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:52:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 07:52:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-12-14 07:52:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 185 states have (on average 2.0864864864864865) internal successors, (386), 200 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 386 transitions. [2022-12-14 07:52:52,696 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 386 transitions. Word has length 5 [2022-12-14 07:52:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:52,696 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 386 transitions. [2022-12-14 07:52:52,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 386 transitions. [2022-12-14 07:52:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:52:52,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:52,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:52:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:52:52,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash -22458292, now seen corresponding path program 1 times [2022-12-14 07:52:52,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:52,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294855279] [2022-12-14 07:52:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:52,754 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 07:52:52,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294855279] [2022-12-14 07:52:52,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294855279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:52,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:52,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568497700] [2022-12-14 07:52:52,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:52,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:52,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:52,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:52,756 INFO L87 Difference]: Start difference. First operand 201 states and 386 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:52,808 INFO L93 Difference]: Finished difference Result 202 states and 381 transitions. [2022-12-14 07:52:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:52:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:52,810 INFO L225 Difference]: With dead ends: 202 [2022-12-14 07:52:52,810 INFO L226 Difference]: Without dead ends: 192 [2022-12-14 07:52:52,810 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 07:52:52,811 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:52,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:52:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-14 07:52:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2022-12-14 07:52:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 171 states have (on average 1.9941520467836258) internal successors, (341), 183 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 341 transitions. [2022-12-14 07:52:52,818 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 341 transitions. Word has length 6 [2022-12-14 07:52:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:52,818 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 341 transitions. [2022-12-14 07:52:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 341 transitions. [2022-12-14 07:52:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:52:52,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:52,819 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 07:52:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:52:52,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 07:52:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash -27487720, now seen corresponding path program 1 times [2022-12-14 07:52:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670384887] [2022-12-14 07:52:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:52:52,830 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:52:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:52:52,853 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:52:52,853 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:52:52,854 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 19 remaining) [2022-12-14 07:52:52,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2022-12-14 07:52:52,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2022-12-14 07:52:52,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2022-12-14 07:52:52,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2022-12-14 07:52:52,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (13 of 19 remaining) [2022-12-14 07:52:52,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2022-12-14 07:52:52,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2022-12-14 07:52:52,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2022-12-14 07:52:52,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2022-12-14 07:52:52,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2022-12-14 07:52:52,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2022-12-14 07:52:52,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (6 of 19 remaining) [2022-12-14 07:52:52,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (5 of 19 remaining) [2022-12-14 07:52:52,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2022-12-14 07:52:52,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2022-12-14 07:52:52,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2022-12-14 07:52:52,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2022-12-14 07:52:52,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2022-12-14 07:52:52,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:52:52,861 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:52:52,863 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:52:52,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 07:52:52,882 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:52:52,885 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:52:52,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 111 transitions, 234 flow [2022-12-14 07:52:52,885 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 111 transitions, 234 flow [2022-12-14 07:52:52,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 234 flow [2022-12-14 07:52:52,923 INFO L130 PetriNetUnfolder]: 13/207 cut-off events. [2022-12-14 07:52:52,924 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 07:52:52,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 207 events. 13/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 634 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 137. Up to 6 conditions per place. [2022-12-14 07:52:52,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 5124 [2022-12-14 07:52:54,366 INFO L134 LiptonReduction]: Checked pairs total: 21222 [2022-12-14 07:52:54,367 INFO L136 LiptonReduction]: Total number of compositions: 82 [2022-12-14 07:52:54,367 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 58 transitions, 128 flow [2022-12-14 07:52:54,514 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5006 states, 4586 states have (on average 3.394461404273877) internal successors, (15567), 5005 states have internal predecessors, (15567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:54,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:52:54,515 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;@76da2a1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:52:54,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-12-14 07:52:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 5006 states, 4586 states have (on average 3.394461404273877) internal successors, (15567), 5005 states have internal predecessors, (15567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:52:54,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:54,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:52:54,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 20725, now seen corresponding path program 1 times [2022-12-14 07:52:54,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:54,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490317851] [2022-12-14 07:52:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:54,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:54,555 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 07:52:54,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:54,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490317851] [2022-12-14 07:52:54,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490317851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:54,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:54,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:52:54,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866675108] [2022-12-14 07:52:54,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:54,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:54,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:54,567 INFO L87 Difference]: Start difference. First operand has 5006 states, 4586 states have (on average 3.394461404273877) internal successors, (15567), 5005 states have internal predecessors, (15567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:54,676 INFO L93 Difference]: Finished difference Result 4795 states and 14062 transitions. [2022-12-14 07:52:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:54,676 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 07:52:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:54,708 INFO L225 Difference]: With dead ends: 4795 [2022-12-14 07:52:54,708 INFO L226 Difference]: Without dead ends: 4795 [2022-12-14 07:52:54,708 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 07:52:54,709 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:54,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 27 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2022-12-14 07:52:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 4795. [2022-12-14 07:52:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 4418 states have (on average 3.182888184698959) internal successors, (14062), 4794 states have internal predecessors, (14062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 14062 transitions. [2022-12-14 07:52:54,836 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 14062 transitions. Word has length 2 [2022-12-14 07:52:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:54,836 INFO L495 AbstractCegarLoop]: Abstraction has 4795 states and 14062 transitions. [2022-12-14 07:52:54,837 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 07:52:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 14062 transitions. [2022-12-14 07:52:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:52:54,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:54,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:52:54,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:52:54,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash 20726, now seen corresponding path program 1 times [2022-12-14 07:52:54,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:54,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697097592] [2022-12-14 07:52:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:54,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:54,855 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 07:52:54,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:54,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697097592] [2022-12-14 07:52:54,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697097592] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:54,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:54,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:52:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468259865] [2022-12-14 07:52:54,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:54,857 INFO L87 Difference]: Start difference. First operand 4795 states and 14062 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:54,963 INFO L93 Difference]: Finished difference Result 4862 states and 14016 transitions. [2022-12-14 07:52:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:54,964 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 07:52:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:54,982 INFO L225 Difference]: With dead ends: 4862 [2022-12-14 07:52:54,983 INFO L226 Difference]: Without dead ends: 4862 [2022-12-14 07:52:54,983 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 07:52:54,983 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:54,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2022-12-14 07:52:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4652. [2022-12-14 07:52:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4306 states have (on average 3.157454714352067) internal successors, (13596), 4651 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13596 transitions. [2022-12-14 07:52:55,113 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13596 transitions. Word has length 2 [2022-12-14 07:52:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:55,113 INFO L495 AbstractCegarLoop]: Abstraction has 4652 states and 13596 transitions. [2022-12-14 07:52:55,113 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 07:52:55,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13596 transitions. [2022-12-14 07:52:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:52:55,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:55,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:52:55,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:52:55,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash 643222, now seen corresponding path program 1 times [2022-12-14 07:52:55,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:55,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688588549] [2022-12-14 07:52:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:55,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:55,139 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 07:52:55,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:55,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688588549] [2022-12-14 07:52:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688588549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:55,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:55,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051712330] [2022-12-14 07:52:55,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:55,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:55,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:55,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:55,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:55,141 INFO L87 Difference]: Start difference. First operand 4652 states and 13596 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:55,235 INFO L93 Difference]: Finished difference Result 4566 states and 13062 transitions. [2022-12-14 07:52:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:52:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:55,262 INFO L225 Difference]: With dead ends: 4566 [2022-12-14 07:52:55,262 INFO L226 Difference]: Without dead ends: 4566 [2022-12-14 07:52:55,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:55,263 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:55,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2022-12-14 07:52:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4342. [2022-12-14 07:52:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4058 states have (on average 3.122227698373583) internal successors, (12670), 4341 states have internal predecessors, (12670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 12670 transitions. [2022-12-14 07:52:55,441 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 12670 transitions. Word has length 3 [2022-12-14 07:52:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:55,441 INFO L495 AbstractCegarLoop]: Abstraction has 4342 states and 12670 transitions. [2022-12-14 07:52:55,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 12670 transitions. [2022-12-14 07:52:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:52:55,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:55,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:52:55,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:52:55,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash 643223, now seen corresponding path program 1 times [2022-12-14 07:52:55,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:55,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687455679] [2022-12-14 07:52:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:55,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:55,504 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 07:52:55,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:55,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687455679] [2022-12-14 07:52:55,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687455679] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:55,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:55,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:55,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682826116] [2022-12-14 07:52:55,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:55,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:55,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:55,506 INFO L87 Difference]: Start difference. First operand 4342 states and 12670 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:55,621 INFO L93 Difference]: Finished difference Result 3920 states and 11380 transitions. [2022-12-14 07:52:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:55,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:52:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:55,642 INFO L225 Difference]: With dead ends: 3920 [2022-12-14 07:52:55,642 INFO L226 Difference]: Without dead ends: 3920 [2022-12-14 07:52:55,642 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 07:52:55,643 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:55,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-12-14 07:52:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3920. [2022-12-14 07:52:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3722 states have (on average 3.0574959699086515) internal successors, (11380), 3919 states have internal predecessors, (11380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 11380 transitions. [2022-12-14 07:52:55,755 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 11380 transitions. Word has length 3 [2022-12-14 07:52:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:55,755 INFO L495 AbstractCegarLoop]: Abstraction has 3920 states and 11380 transitions. [2022-12-14 07:52:55,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 11380 transitions. [2022-12-14 07:52:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:52:55,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:55,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:52:55,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:52:55,756 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash 617922401, now seen corresponding path program 1 times [2022-12-14 07:52:55,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:55,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86383638] [2022-12-14 07:52:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:55,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:55,797 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 07:52:55,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:55,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86383638] [2022-12-14 07:52:55,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86383638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:55,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:55,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898026415] [2022-12-14 07:52:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:55,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:55,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:55,799 INFO L87 Difference]: Start difference. First operand 3920 states and 11380 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:55,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:55,906 INFO L93 Difference]: Finished difference Result 4458 states and 12691 transitions. [2022-12-14 07:52:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:52:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:55,921 INFO L225 Difference]: With dead ends: 4458 [2022-12-14 07:52:55,921 INFO L226 Difference]: Without dead ends: 4458 [2022-12-14 07:52:55,922 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 07:52:55,922 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:55,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 41 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2022-12-14 07:52:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 3744. [2022-12-14 07:52:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3568 states have (on average 3.0905269058295963) internal successors, (11027), 3743 states have internal predecessors, (11027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 11027 transitions. [2022-12-14 07:52:56,002 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 11027 transitions. Word has length 5 [2022-12-14 07:52:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:56,003 INFO L495 AbstractCegarLoop]: Abstraction has 3744 states and 11027 transitions. [2022-12-14 07:52:56,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 11027 transitions. [2022-12-14 07:52:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:52:56,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:56,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:52:56,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:52:56,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 617922402, now seen corresponding path program 1 times [2022-12-14 07:52:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:56,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364455433] [2022-12-14 07:52:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:56,060 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 07:52:56,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364455433] [2022-12-14 07:52:56,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364455433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:56,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:56,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844558387] [2022-12-14 07:52:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:56,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:56,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:56,062 INFO L87 Difference]: Start difference. First operand 3744 states and 11027 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:56,173 INFO L93 Difference]: Finished difference Result 3196 states and 9237 transitions. [2022-12-14 07:52:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:56,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:52:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:56,182 INFO L225 Difference]: With dead ends: 3196 [2022-12-14 07:52:56,182 INFO L226 Difference]: Without dead ends: 3196 [2022-12-14 07:52:56,183 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 07:52:56,183 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:56,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-12-14 07:52:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3196. [2022-12-14 07:52:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3080 states have (on average 2.999025974025974) internal successors, (9237), 3195 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 9237 transitions. [2022-12-14 07:52:56,247 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 9237 transitions. Word has length 5 [2022-12-14 07:52:56,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:56,247 INFO L495 AbstractCegarLoop]: Abstraction has 3196 states and 9237 transitions. [2022-12-14 07:52:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 9237 transitions. [2022-12-14 07:52:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:52:56,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:56,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:52:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:52:56,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1982896271, now seen corresponding path program 1 times [2022-12-14 07:52:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:56,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184943647] [2022-12-14 07:52:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:56,280 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 07:52:56,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184943647] [2022-12-14 07:52:56,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184943647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:56,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:56,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021649973] [2022-12-14 07:52:56,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:56,282 INFO L87 Difference]: Start difference. First operand 3196 states and 9237 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:56,375 INFO L93 Difference]: Finished difference Result 3543 states and 10028 transitions. [2022-12-14 07:52:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:52:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:56,383 INFO L225 Difference]: With dead ends: 3543 [2022-12-14 07:52:56,383 INFO L226 Difference]: Without dead ends: 3503 [2022-12-14 07:52:56,383 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 07:52:56,384 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:56,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2022-12-14 07:52:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3217. [2022-12-14 07:52:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3113 states have (on average 2.937038226790877) internal successors, (9143), 3216 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 9143 transitions. [2022-12-14 07:52:56,467 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 9143 transitions. Word has length 6 [2022-12-14 07:52:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:56,467 INFO L495 AbstractCegarLoop]: Abstraction has 3217 states and 9143 transitions. [2022-12-14 07:52:56,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 9143 transitions. [2022-12-14 07:52:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:52:56,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:56,468 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:52:56,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:52:56,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1355997420, now seen corresponding path program 1 times [2022-12-14 07:52:56,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:56,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228249747] [2022-12-14 07:52:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:56,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:56,504 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 07:52:56,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:56,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228249747] [2022-12-14 07:52:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228249747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:56,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:56,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:56,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012889022] [2022-12-14 07:52:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:56,505 INFO L87 Difference]: Start difference. First operand 3217 states and 9143 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:56,605 INFO L93 Difference]: Finished difference Result 3817 states and 10720 transitions. [2022-12-14 07:52:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:52:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:56,616 INFO L225 Difference]: With dead ends: 3817 [2022-12-14 07:52:56,616 INFO L226 Difference]: Without dead ends: 3817 [2022-12-14 07:52:56,617 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 07:52:56,617 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:56,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:56,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2022-12-14 07:52:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3191. [2022-12-14 07:52:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3087 states have (on average 2.996760609005507) internal successors, (9251), 3190 states have internal predecessors, (9251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 9251 transitions. [2022-12-14 07:52:56,695 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 9251 transitions. Word has length 9 [2022-12-14 07:52:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:56,696 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 9251 transitions. [2022-12-14 07:52:56,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 9251 transitions. [2022-12-14 07:52:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:52:56,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:56,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:52:56,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:52:56,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1355997419, now seen corresponding path program 1 times [2022-12-14 07:52:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901922942] [2022-12-14 07:52:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:56,761 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 07:52:56,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:56,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901922942] [2022-12-14 07:52:56,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901922942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:56,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:56,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:52:56,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832374746] [2022-12-14 07:52:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:52:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:52:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:52:56,763 INFO L87 Difference]: Start difference. First operand 3191 states and 9251 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:56,836 INFO L93 Difference]: Finished difference Result 2789 states and 7875 transitions. [2022-12-14 07:52:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:52:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:52:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:56,842 INFO L225 Difference]: With dead ends: 2789 [2022-12-14 07:52:56,843 INFO L226 Difference]: Without dead ends: 2783 [2022-12-14 07:52:56,843 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 07:52:56,843 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:56,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 42 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2022-12-14 07:52:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2783. [2022-12-14 07:52:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2705 states have (on average 2.9046210720887244) internal successors, (7857), 2782 states have internal predecessors, (7857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7857 transitions. [2022-12-14 07:52:56,885 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7857 transitions. Word has length 9 [2022-12-14 07:52:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:56,885 INFO L495 AbstractCegarLoop]: Abstraction has 2783 states and 7857 transitions. [2022-12-14 07:52:56,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7857 transitions. [2022-12-14 07:52:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:52:56,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:56,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:52:56,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 07:52:56,886 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2080708982, now seen corresponding path program 1 times [2022-12-14 07:52:56,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228570097] [2022-12-14 07:52:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:52:56,975 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 07:52:56,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:52:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228570097] [2022-12-14 07:52:56,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228570097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:52:56,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:52:56,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:52:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486724381] [2022-12-14 07:52:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:52:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:52:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:52:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:52:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:52:56,977 INFO L87 Difference]: Start difference. First operand 2783 states and 7857 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:52:57,095 INFO L93 Difference]: Finished difference Result 3056 states and 8545 transitions. [2022-12-14 07:52:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:52:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 07:52:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:52:57,103 INFO L225 Difference]: With dead ends: 3056 [2022-12-14 07:52:57,103 INFO L226 Difference]: Without dead ends: 3047 [2022-12-14 07:52:57,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:52:57,103 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:52:57,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:52:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-12-14 07:52:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2771. [2022-12-14 07:52:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2694 states have (on average 2.910541945063103) internal successors, (7841), 2770 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 7841 transitions. [2022-12-14 07:52:57,160 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 7841 transitions. Word has length 11 [2022-12-14 07:52:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:52:57,160 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 7841 transitions. [2022-12-14 07:52:57,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:52:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 7841 transitions. [2022-12-14 07:52:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:52:57,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:52:57,161 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 07:52:57,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 07:52:57,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-12-14 07:52:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:52:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1740205789, now seen corresponding path program 1 times [2022-12-14 07:52:57,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:52:57,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293968568] [2022-12-14 07:52:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:52:57,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:52:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:52:57,170 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:52:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:52:57,177 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:52:57,177 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (18 of 24 remaining) [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2022-12-14 07:52:57,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (11 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (10 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2022-12-14 07:52:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 24 remaining) [2022-12-14 07:52:57,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (5 of 24 remaining) [2022-12-14 07:52:57,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2022-12-14 07:52:57,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2022-12-14 07:52:57,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2022-12-14 07:52:57,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2022-12-14 07:52:57,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 24 remaining) [2022-12-14 07:52:57,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:52:57,180 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:52:57,181 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:52:57,181 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 07:52:57,202 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:52:57,204 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:52:57,204 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 133 transitions, 287 flow [2022-12-14 07:52:57,204 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 133 transitions, 287 flow [2022-12-14 07:52:57,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 287 flow [2022-12-14 07:52:57,236 INFO L130 PetriNetUnfolder]: 18/278 cut-off events. [2022-12-14 07:52:57,237 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 07:52:57,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 278 events. 18/278 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 958 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2022-12-14 07:52:57,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 9072 [2022-12-14 07:52:58,855 INFO L134 LiptonReduction]: Checked pairs total: 40168 [2022-12-14 07:52:58,855 INFO L136 LiptonReduction]: Total number of compositions: 90 [2022-12-14 07:52:58,856 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 73 transitions, 167 flow [2022-12-14 07:53:00,187 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 70538 states, 67995 states have (on average 4.2625634237811605) internal successors, (289833), 70537 states have internal predecessors, (289833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:00,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:53:00,188 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;@76da2a1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:53:00,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2022-12-14 07:53:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 70538 states, 67995 states have (on average 4.2625634237811605) internal successors, (289833), 70537 states have internal predecessors, (289833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:53:00,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:00,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:53:00,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:00,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:00,256 INFO L85 PathProgramCache]: Analyzing trace with hash 28531, now seen corresponding path program 1 times [2022-12-14 07:53:00,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:00,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186298769] [2022-12-14 07:53:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:00,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:00,269 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 07:53:00,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:00,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186298769] [2022-12-14 07:53:00,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186298769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:00,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:00,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334088798] [2022-12-14 07:53:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:00,340 INFO L87 Difference]: Start difference. First operand has 70538 states, 67995 states have (on average 4.2625634237811605) internal successors, (289833), 70537 states have internal predecessors, (289833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:01,047 INFO L93 Difference]: Finished difference Result 75104 states and 288862 transitions. [2022-12-14 07:53:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:01,048 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 07:53:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:01,451 INFO L225 Difference]: With dead ends: 75104 [2022-12-14 07:53:01,451 INFO L226 Difference]: Without dead ends: 75104 [2022-12-14 07:53:01,451 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 07:53:01,452 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:01,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 38 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75104 states. [2022-12-14 07:53:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75104 to 69278. [2022-12-14 07:53:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69278 states, 66891 states have (on average 4.058647650655544) internal successors, (271487), 69277 states have internal predecessors, (271487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69278 states to 69278 states and 271487 transitions. [2022-12-14 07:53:03,519 INFO L78 Accepts]: Start accepts. Automaton has 69278 states and 271487 transitions. Word has length 2 [2022-12-14 07:53:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:03,519 INFO L495 AbstractCegarLoop]: Abstraction has 69278 states and 271487 transitions. [2022-12-14 07:53:03,520 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 07:53:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 69278 states and 271487 transitions. [2022-12-14 07:53:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:53:03,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:03,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:53:03,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 07:53:03,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 28532, now seen corresponding path program 1 times [2022-12-14 07:53:03,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457249387] [2022-12-14 07:53:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:03,543 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 07:53:03,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:03,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457249387] [2022-12-14 07:53:03,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457249387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:03,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:03,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:03,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301519791] [2022-12-14 07:53:03,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:03,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:03,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:03,545 INFO L87 Difference]: Start difference. First operand 69278 states and 271487 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:04,151 INFO L93 Difference]: Finished difference Result 66323 states and 259530 transitions. [2022-12-14 07:53:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:04,152 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 07:53:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:04,631 INFO L225 Difference]: With dead ends: 66323 [2022-12-14 07:53:04,631 INFO L226 Difference]: Without dead ends: 66323 [2022-12-14 07:53:04,631 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 07:53:04,632 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:04,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66323 states. [2022-12-14 07:53:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66323 to 66323. [2022-12-14 07:53:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66323 states, 64195 states have (on average 4.042838227276268) internal successors, (259530), 66322 states have internal predecessors, (259530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66323 states to 66323 states and 259530 transitions. [2022-12-14 07:53:06,364 INFO L78 Accepts]: Start accepts. Automaton has 66323 states and 259530 transitions. Word has length 2 [2022-12-14 07:53:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:06,364 INFO L495 AbstractCegarLoop]: Abstraction has 66323 states and 259530 transitions. [2022-12-14 07:53:06,364 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 07:53:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 66323 states and 259530 transitions. [2022-12-14 07:53:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:53:06,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:06,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:53:06,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 07:53:06,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash 885516, now seen corresponding path program 1 times [2022-12-14 07:53:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:06,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533985712] [2022-12-14 07:53:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:06,397 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 07:53:06,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:06,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533985712] [2022-12-14 07:53:06,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533985712] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:06,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:06,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41255245] [2022-12-14 07:53:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:06,399 INFO L87 Difference]: Start difference. First operand 66323 states and 259530 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:07,092 INFO L93 Difference]: Finished difference Result 67313 states and 257763 transitions. [2022-12-14 07:53:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:07,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:53:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:07,365 INFO L225 Difference]: With dead ends: 67313 [2022-12-14 07:53:07,366 INFO L226 Difference]: Without dead ends: 67313 [2022-12-14 07:53:07,366 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 07:53:07,366 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:07,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 51 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67313 states. [2022-12-14 07:53:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67313 to 62713. [2022-12-14 07:53:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62713 states, 60897 states have (on average 4.023465852176626) internal successors, (245017), 62712 states have internal predecessors, (245017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62713 states to 62713 states and 245017 transitions. [2022-12-14 07:53:08,998 INFO L78 Accepts]: Start accepts. Automaton has 62713 states and 245017 transitions. Word has length 3 [2022-12-14 07:53:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:08,999 INFO L495 AbstractCegarLoop]: Abstraction has 62713 states and 245017 transitions. [2022-12-14 07:53:08,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 62713 states and 245017 transitions. [2022-12-14 07:53:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:53:08,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:08,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:53:08,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 07:53:08,999 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash 885517, now seen corresponding path program 1 times [2022-12-14 07:53:09,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221956834] [2022-12-14 07:53:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:09,035 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 07:53:09,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:09,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221956834] [2022-12-14 07:53:09,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221956834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:09,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:09,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:09,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308749680] [2022-12-14 07:53:09,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:09,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:09,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:09,036 INFO L87 Difference]: Start difference. First operand 62713 states and 245017 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:09,685 INFO L93 Difference]: Finished difference Result 56803 states and 220681 transitions. [2022-12-14 07:53:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:09,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:53:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:09,959 INFO L225 Difference]: With dead ends: 56803 [2022-12-14 07:53:09,959 INFO L226 Difference]: Without dead ends: 56803 [2022-12-14 07:53:09,959 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 07:53:09,959 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:09,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56803 states. [2022-12-14 07:53:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56803 to 56803. [2022-12-14 07:53:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56803 states, 55505 states have (on average 3.975876047202955) internal successors, (220681), 56802 states have internal predecessors, (220681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56803 states to 56803 states and 220681 transitions. [2022-12-14 07:53:11,576 INFO L78 Accepts]: Start accepts. Automaton has 56803 states and 220681 transitions. Word has length 3 [2022-12-14 07:53:11,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:11,576 INFO L495 AbstractCegarLoop]: Abstraction has 56803 states and 220681 transitions. [2022-12-14 07:53:11,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:11,577 INFO L276 IsEmpty]: Start isEmpty. Operand 56803 states and 220681 transitions. [2022-12-14 07:53:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:53:11,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:11,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:53:11,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 07:53:11,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash 850705677, now seen corresponding path program 1 times [2022-12-14 07:53:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:11,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323461007] [2022-12-14 07:53:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:11,598 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 07:53:11,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323461007] [2022-12-14 07:53:11,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323461007] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:11,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:11,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:11,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253930103] [2022-12-14 07:53:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:11,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:11,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:11,599 INFO L87 Difference]: Start difference. First operand 56803 states and 220681 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:12,232 INFO L93 Difference]: Finished difference Result 67927 states and 258425 transitions. [2022-12-14 07:53:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:53:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:12,487 INFO L225 Difference]: With dead ends: 67927 [2022-12-14 07:53:12,487 INFO L226 Difference]: Without dead ends: 67927 [2022-12-14 07:53:12,487 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 07:53:12,488 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:12,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 51 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67927 states. [2022-12-14 07:53:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67927 to 55269. [2022-12-14 07:53:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55269 states, 54083 states have (on average 4.013886064012721) internal successors, (217083), 55268 states have internal predecessors, (217083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55269 states to 55269 states and 217083 transitions. [2022-12-14 07:53:14,275 INFO L78 Accepts]: Start accepts. Automaton has 55269 states and 217083 transitions. Word has length 5 [2022-12-14 07:53:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:14,276 INFO L495 AbstractCegarLoop]: Abstraction has 55269 states and 217083 transitions. [2022-12-14 07:53:14,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 55269 states and 217083 transitions. [2022-12-14 07:53:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:53:14,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:14,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:53:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 07:53:14,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash 850705678, now seen corresponding path program 1 times [2022-12-14 07:53:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:14,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685093599] [2022-12-14 07:53:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:14,310 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 07:53:14,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:14,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685093599] [2022-12-14 07:53:14,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685093599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:14,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:14,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:14,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272767561] [2022-12-14 07:53:14,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:14,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:14,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:14,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:14,311 INFO L87 Difference]: Start difference. First operand 55269 states and 217083 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:14,626 INFO L93 Difference]: Finished difference Result 47343 states and 182971 transitions. [2022-12-14 07:53:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:14,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:53:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:14,820 INFO L225 Difference]: With dead ends: 47343 [2022-12-14 07:53:14,820 INFO L226 Difference]: Without dead ends: 47343 [2022-12-14 07:53:14,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:14,821 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:14,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 53 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47343 states. [2022-12-14 07:53:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47343 to 47343. [2022-12-14 07:53:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47343 states, 46559 states have (on average 3.929873923409008) internal successors, (182971), 47342 states have internal predecessors, (182971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47343 states to 47343 states and 182971 transitions. [2022-12-14 07:53:16,021 INFO L78 Accepts]: Start accepts. Automaton has 47343 states and 182971 transitions. Word has length 5 [2022-12-14 07:53:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:16,021 INFO L495 AbstractCegarLoop]: Abstraction has 47343 states and 182971 transitions. [2022-12-14 07:53:16,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 47343 states and 182971 transitions. [2022-12-14 07:53:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:53:16,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:16,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:53:16,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 07:53:16,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash 611355752, now seen corresponding path program 1 times [2022-12-14 07:53:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:16,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830303044] [2022-12-14 07:53:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:16,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:16,051 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 07:53:16,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:16,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830303044] [2022-12-14 07:53:16,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830303044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:16,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:16,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532001200] [2022-12-14 07:53:16,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:16,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:16,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:16,052 INFO L87 Difference]: Start difference. First operand 47343 states and 182971 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:16,444 INFO L93 Difference]: Finished difference Result 57741 states and 217832 transitions. [2022-12-14 07:53:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:53:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:16,660 INFO L225 Difference]: With dead ends: 57741 [2022-12-14 07:53:16,660 INFO L226 Difference]: Without dead ends: 57587 [2022-12-14 07:53:16,660 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 07:53:16,661 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:16,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57587 states. [2022-12-14 07:53:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57587 to 51189. [2022-12-14 07:53:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51189 states, 50462 states have (on average 3.8514525781776388) internal successors, (194352), 51188 states have internal predecessors, (194352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51189 states to 51189 states and 194352 transitions. [2022-12-14 07:53:18,371 INFO L78 Accepts]: Start accepts. Automaton has 51189 states and 194352 transitions. Word has length 6 [2022-12-14 07:53:18,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:18,371 INFO L495 AbstractCegarLoop]: Abstraction has 51189 states and 194352 transitions. [2022-12-14 07:53:18,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 51189 states and 194352 transitions. [2022-12-14 07:53:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:53:18,371 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:18,371 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:18,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 07:53:18,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:18,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1923824368, now seen corresponding path program 1 times [2022-12-14 07:53:18,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:18,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000484355] [2022-12-14 07:53:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:18,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:18,400 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 07:53:18,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:18,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000484355] [2022-12-14 07:53:18,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000484355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:18,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:18,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:18,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439861292] [2022-12-14 07:53:18,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:18,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:18,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:18,401 INFO L87 Difference]: Start difference. First operand 51189 states and 194352 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:18,827 INFO L93 Difference]: Finished difference Result 64559 states and 241622 transitions. [2022-12-14 07:53:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:53:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:19,080 INFO L225 Difference]: With dead ends: 64559 [2022-12-14 07:53:19,080 INFO L226 Difference]: Without dead ends: 64559 [2022-12-14 07:53:19,081 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 07:53:19,081 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:19,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64559 states. [2022-12-14 07:53:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64559 to 51783. [2022-12-14 07:53:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51783 states, 51056 states have (on average 3.917737386399248) internal successors, (200024), 51782 states have internal predecessors, (200024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51783 states to 51783 states and 200024 transitions. [2022-12-14 07:53:20,506 INFO L78 Accepts]: Start accepts. Automaton has 51783 states and 200024 transitions. Word has length 9 [2022-12-14 07:53:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:20,507 INFO L495 AbstractCegarLoop]: Abstraction has 51783 states and 200024 transitions. [2022-12-14 07:53:20,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 51783 states and 200024 transitions. [2022-12-14 07:53:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:53:20,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:20,507 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:20,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 07:53:20,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:20,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1923824369, now seen corresponding path program 1 times [2022-12-14 07:53:20,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:20,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236431808] [2022-12-14 07:53:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:20,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:20,557 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 07:53:20,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236431808] [2022-12-14 07:53:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236431808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:20,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:20,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327519425] [2022-12-14 07:53:20,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:20,559 INFO L87 Difference]: Start difference. First operand 51783 states and 200024 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:20,835 INFO L93 Difference]: Finished difference Result 45209 states and 171104 transitions. [2022-12-14 07:53:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:53:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:21,010 INFO L225 Difference]: With dead ends: 45209 [2022-12-14 07:53:21,010 INFO L226 Difference]: Without dead ends: 45197 [2022-12-14 07:53:21,010 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 07:53:21,011 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:21,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 54 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45197 states. [2022-12-14 07:53:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45197 to 45197. [2022-12-14 07:53:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45197 states, 44680 states have (on average 3.828692927484333) internal successors, (171066), 45196 states have internal predecessors, (171066), 0 states have call successors, (0), 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 07:53:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45197 states to 45197 states and 171066 transitions. [2022-12-14 07:53:22,236 INFO L78 Accepts]: Start accepts. Automaton has 45197 states and 171066 transitions. Word has length 9 [2022-12-14 07:53:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:22,236 INFO L495 AbstractCegarLoop]: Abstraction has 45197 states and 171066 transitions. [2022-12-14 07:53:22,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 45197 states and 171066 transitions. [2022-12-14 07:53:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:53:22,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:22,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:22,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 07:53:22,237 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash -464697506, now seen corresponding path program 1 times [2022-12-14 07:53:22,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:22,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226235211] [2022-12-14 07:53:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:22,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:22,340 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 07:53:22,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:22,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226235211] [2022-12-14 07:53:22,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226235211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:22,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:22,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:53:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351816602] [2022-12-14 07:53:22,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:22,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:53:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:53:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:53:22,342 INFO L87 Difference]: Start difference. First operand 45197 states and 171066 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:22,918 INFO L93 Difference]: Finished difference Result 51441 states and 193146 transitions. [2022-12-14 07:53:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:53:22,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 07:53:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:23,282 INFO L225 Difference]: With dead ends: 51441 [2022-12-14 07:53:23,282 INFO L226 Difference]: Without dead ends: 51432 [2022-12-14 07:53:23,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:53:23,283 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:23,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 117 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:53:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51432 states. [2022-12-14 07:53:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51432 to 45184. [2022-12-14 07:53:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45184 states, 44668 states have (on average 3.829273753022298) internal successors, (171046), 45183 states have internal predecessors, (171046), 0 states have call successors, (0), 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 07:53:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45184 states to 45184 states and 171046 transitions. [2022-12-14 07:53:24,322 INFO L78 Accepts]: Start accepts. Automaton has 45184 states and 171046 transitions. Word has length 11 [2022-12-14 07:53:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:24,322 INFO L495 AbstractCegarLoop]: Abstraction has 45184 states and 171046 transitions. [2022-12-14 07:53:24,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 45184 states and 171046 transitions. [2022-12-14 07:53:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:53:24,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:24,323 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 07:53:24,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1611137877, now seen corresponding path program 1 times [2022-12-14 07:53:24,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:24,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843083933] [2022-12-14 07:53:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:24,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:53:24,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843083933] [2022-12-14 07:53:24,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843083933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:24,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:24,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:24,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724892874] [2022-12-14 07:53:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:24,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:24,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:24,351 INFO L87 Difference]: Start difference. First operand 45184 states and 171046 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 07:53:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:24,756 INFO L93 Difference]: Finished difference Result 58248 states and 219207 transitions. [2022-12-14 07:53:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:24,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 07:53:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:24,969 INFO L225 Difference]: With dead ends: 58248 [2022-12-14 07:53:24,969 INFO L226 Difference]: Without dead ends: 58248 [2022-12-14 07:53:24,969 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 07:53:24,969 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:24,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 45 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58248 states. [2022-12-14 07:53:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58248 to 46374. [2022-12-14 07:53:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46374 states, 45858 states have (on average 3.9098521522962186) internal successors, (179298), 46373 states have internal predecessors, (179298), 0 states have call successors, (0), 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 07:53:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46374 states to 46374 states and 179298 transitions. [2022-12-14 07:53:26,316 INFO L78 Accepts]: Start accepts. Automaton has 46374 states and 179298 transitions. Word has length 13 [2022-12-14 07:53:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:26,317 INFO L495 AbstractCegarLoop]: Abstraction has 46374 states and 179298 transitions. [2022-12-14 07:53:26,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 07:53:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 46374 states and 179298 transitions. [2022-12-14 07:53:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:53:26,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:26,318 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:26,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 07:53:26,318 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1611137876, now seen corresponding path program 1 times [2022-12-14 07:53:26,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:26,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553540911] [2022-12-14 07:53:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:26,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:53:26,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:26,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553540911] [2022-12-14 07:53:26,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553540911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:26,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:26,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:26,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707741642] [2022-12-14 07:53:26,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:26,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:26,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:26,374 INFO L87 Difference]: Start difference. First operand 46374 states and 179298 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 07:53:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:26,725 INFO L93 Difference]: Finished difference Result 40916 states and 154742 transitions. [2022-12-14 07:53:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 07:53:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:26,892 INFO L225 Difference]: With dead ends: 40916 [2022-12-14 07:53:26,893 INFO L226 Difference]: Without dead ends: 40910 [2022-12-14 07:53:26,893 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 07:53:26,893 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 52 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:26,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 51 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40910 states. [2022-12-14 07:53:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40910 to 40910. [2022-12-14 07:53:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40910 states, 40528 states have (on average 3.8176569285432294) internal successors, (154722), 40909 states have internal predecessors, (154722), 0 states have call successors, (0), 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 07:53:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40910 states to 40910 states and 154722 transitions. [2022-12-14 07:53:27,940 INFO L78 Accepts]: Start accepts. Automaton has 40910 states and 154722 transitions. Word has length 13 [2022-12-14 07:53:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:27,940 INFO L495 AbstractCegarLoop]: Abstraction has 40910 states and 154722 transitions. [2022-12-14 07:53:27,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 07:53:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 40910 states and 154722 transitions. [2022-12-14 07:53:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 07:53:27,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:27,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:27,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 07:53:27,941 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1163161207, now seen corresponding path program 1 times [2022-12-14 07:53:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:27,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657542730] [2022-12-14 07:53:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:27,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:27,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657542730] [2022-12-14 07:53:27,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657542730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:27,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:27,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249431993] [2022-12-14 07:53:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:53:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:53:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:53:27,986 INFO L87 Difference]: Start difference. First operand 40910 states and 154722 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 07:53:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:28,302 INFO L93 Difference]: Finished difference Result 44167 states and 164193 transitions. [2022-12-14 07:53:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:53:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2022-12-14 07:53:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:28,443 INFO L225 Difference]: With dead ends: 44167 [2022-12-14 07:53:28,443 INFO L226 Difference]: Without dead ends: 44167 [2022-12-14 07:53:28,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:53:28,444 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:28,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 56 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44167 states. [2022-12-14 07:53:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44167 to 40531. [2022-12-14 07:53:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40531 states, 40162 states have (on average 3.821323639260993) internal successors, (153472), 40530 states have internal predecessors, (153472), 0 states have call successors, (0), 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 07:53:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40531 states to 40531 states and 153472 transitions. [2022-12-14 07:53:29,370 INFO L78 Accepts]: Start accepts. Automaton has 40531 states and 153472 transitions. Word has length 14 [2022-12-14 07:53:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:29,370 INFO L495 AbstractCegarLoop]: Abstraction has 40531 states and 153472 transitions. [2022-12-14 07:53:29,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 07:53:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 40531 states and 153472 transitions. [2022-12-14 07:53:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:53:29,371 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:29,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:29,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 07:53:29,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:29,371 INFO L85 PathProgramCache]: Analyzing trace with hash -27997806, now seen corresponding path program 1 times [2022-12-14 07:53:29,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:29,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501059917] [2022-12-14 07:53:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:29,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:53:29,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501059917] [2022-12-14 07:53:29,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501059917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:29,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:29,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:53:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924595081] [2022-12-14 07:53:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:53:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:53:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:53:29,425 INFO L87 Difference]: Start difference. First operand 40531 states and 153472 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 07:53:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:29,944 INFO L93 Difference]: Finished difference Result 58813 states and 222436 transitions. [2022-12-14 07:53:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:53:29,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 07:53:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:30,150 INFO L225 Difference]: With dead ends: 58813 [2022-12-14 07:53:30,150 INFO L226 Difference]: Without dead ends: 58813 [2022-12-14 07:53:30,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:53:30,151 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 74 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:30,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 78 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:53:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58813 states. [2022-12-14 07:53:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58813 to 42257. [2022-12-14 07:53:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42257 states, 41888 states have (on average 3.8490975935828877) internal successors, (161231), 42256 states have internal predecessors, (161231), 0 states have call successors, (0), 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 07:53:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42257 states to 42257 states and 161231 transitions. [2022-12-14 07:53:31,360 INFO L78 Accepts]: Start accepts. Automaton has 42257 states and 161231 transitions. Word has length 15 [2022-12-14 07:53:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:31,361 INFO L495 AbstractCegarLoop]: Abstraction has 42257 states and 161231 transitions. [2022-12-14 07:53:31,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 07:53:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 42257 states and 161231 transitions. [2022-12-14 07:53:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:53:31,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:31,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:31,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 07:53:31,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2033131382, now seen corresponding path program 1 times [2022-12-14 07:53:31,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:31,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472375622] [2022-12-14 07:53:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:31,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:53:31,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:31,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472375622] [2022-12-14 07:53:31,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472375622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:31,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:31,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:53:31,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289205559] [2022-12-14 07:53:31,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:31,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:53:31,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:53:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:53:31,436 INFO L87 Difference]: Start difference. First operand 42257 states and 161231 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 07:53:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:32,009 INFO L93 Difference]: Finished difference Result 55199 states and 203738 transitions. [2022-12-14 07:53:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:53:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 07:53:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:32,199 INFO L225 Difference]: With dead ends: 55199 [2022-12-14 07:53:32,199 INFO L226 Difference]: Without dead ends: 55199 [2022-12-14 07:53:32,199 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 07:53:32,199 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 154 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:32,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 121 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:53:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55199 states. [2022-12-14 07:53:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55199 to 40297. [2022-12-14 07:53:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40297 states, 39954 states have (on average 3.805851729488912) internal successors, (152059), 40296 states have internal predecessors, (152059), 0 states have call successors, (0), 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 07:53:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40297 states to 40297 states and 152059 transitions. [2022-12-14 07:53:33,258 INFO L78 Accepts]: Start accepts. Automaton has 40297 states and 152059 transitions. Word has length 15 [2022-12-14 07:53:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:33,258 INFO L495 AbstractCegarLoop]: Abstraction has 40297 states and 152059 transitions. [2022-12-14 07:53:33,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 07:53:33,258 INFO L276 IsEmpty]: Start isEmpty. Operand 40297 states and 152059 transitions. [2022-12-14 07:53:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:53:33,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:33,259 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 07:53:33,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 07:53:33,259 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2022-12-14 07:53:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2118352160, now seen corresponding path program 1 times [2022-12-14 07:53:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:33,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866044165] [2022-12-14 07:53:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:53:33,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:53:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:53:33,271 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:53:33,271 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:53:33,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2022-12-14 07:53:33,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (23 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 29 remaining) [2022-12-14 07:53:33,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 29 remaining) [2022-12-14 07:53:33,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (16 of 29 remaining) [2022-12-14 07:53:33,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (15 of 29 remaining) [2022-12-14 07:53:33,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 29 remaining) [2022-12-14 07:53:33,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (10 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (5 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 29 remaining) [2022-12-14 07:53:33,392 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 29 remaining) [2022-12-14 07:53:33,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 07:53:33,393 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:33,393 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:53:33,393 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 07:53:33,418 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:53:33,420 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:53:33,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 155 transitions, 342 flow [2022-12-14 07:53:33,420 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 155 transitions, 342 flow [2022-12-14 07:53:33,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 155 transitions, 342 flow [2022-12-14 07:53:33,453 INFO L130 PetriNetUnfolder]: 23/349 cut-off events. [2022-12-14 07:53:33,453 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-14 07:53:33,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 349 events. 23/349 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1287 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 286. Up to 10 conditions per place. [2022-12-14 07:53:33,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2022-12-14 07:53:35,050 INFO L134 LiptonReduction]: Checked pairs total: 52454 [2022-12-14 07:53:35,050 INFO L136 LiptonReduction]: Total number of compositions: 106 [2022-12-14 07:53:35,051 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 89 places, 90 transitions, 212 flow [2022-12-14 07:53:56,132 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 989266 states, 973980 states have (on average 5.333463726154541) internal successors, (5194687), 989265 states have internal predecessors, (5194687), 0 states have call successors, (0), 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 07:53:56,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:53:56,133 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;@76da2a1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:53:56,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-14 07:53:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 989266 states, 973980 states have (on average 5.333463726154541) internal successors, (5194687), 989265 states have internal predecessors, (5194687), 0 states have call successors, (0), 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 07:53:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:53:57,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:57,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:53:57,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:53:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash 37682, now seen corresponding path program 1 times [2022-12-14 07:53:57,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:57,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903324166] [2022-12-14 07:53:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:57,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:57,456 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 07:53:57,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:53:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903324166] [2022-12-14 07:53:57,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903324166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:57,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:57,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:57,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776123895] [2022-12-14 07:53:57,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:57,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:57,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:53:57,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:57,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:58,764 INFO L87 Difference]: Start difference. First operand has 989266 states, 973980 states have (on average 5.333463726154541) internal successors, (5194687), 989265 states have internal predecessors, (5194687), 0 states have call successors, (0), 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)