./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/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_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --- 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 10:57:11,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:57:11,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:57:11,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:57:11,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:57:11,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:57:11,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:57:11,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:57:11,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:57:11,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:57:11,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:57:11,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:57:11,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:57:11,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:57:11,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:57:11,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:57:11,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:57:11,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:57:11,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:57:11,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:57:11,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:57:11,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:57:11,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:57:11,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:57:11,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:57:11,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:57:11,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:57:11,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:57:11,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:57:11,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:57:11,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:57:11,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:57:11,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:57:11,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:57:11,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:57:11,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:57:11,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:57:11,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:57:11,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:57:11,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:57:11,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:57:11,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:57:11,339 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:57:11,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:57:11,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:57:11,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:57:11,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:57:11,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:57:11,345 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:57:11,345 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:57:11,345 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:57:11,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:57:11,345 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:57:11,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:57:11,346 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:57:11,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:57:11,346 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:57:11,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:57:11,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:57:11,346 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:57:11,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:57:11,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:57:11,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:57:11,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:57:11,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:57:11,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:57:11,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:57:11,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:57:11,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:57:11,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:57:11,348 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:57:11,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:57:11,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:57:11,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:57:11,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:57:11,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:57:11,349 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:57:11,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:57:11,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:57:11,349 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:57:11,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:57:11,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:57:11,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:57:11,350 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_5567006b-d120-4b68-92b2-4f59c559594c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2022-12-14 10:57:11,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:57:11,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:57:11,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:57:11,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:57:11,537 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:57:11,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-12-14 10:57:14,151 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:57:14,330 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:57:14,330 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-12-14 10:57:14,339 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/data/3c16053b1/a7d15301797040abaf28bfa994ae6c86/FLAG3071973cb [2022-12-14 10:57:14,350 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/data/3c16053b1/a7d15301797040abaf28bfa994ae6c86 [2022-12-14 10:57:14,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:57:14,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:57:14,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:57:14,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:57:14,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:57:14,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db675e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14, skipping insertion in model container [2022-12-14 10:57:14,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:57:14,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:57:14,499 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 10:57:14,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:57:14,587 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_5567006b-d120-4b68-92b2-4f59c559594c/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-12-14 10:57:14,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:57:14,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:57:14,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:57:14,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:57:14,601 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:57:14,612 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 10:57:14,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:57:14,625 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_5567006b-d120-4b68-92b2-4f59c559594c/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-12-14 10:57:14,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:57:14,626 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:57:14,626 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:57:14,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:57:14,649 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:57:14,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14 WrapperNode [2022-12-14 10:57:14,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:57:14,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:57:14,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:57:14,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:57:14,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,678 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2022-12-14 10:57:14,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:57:14,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:57:14,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:57:14,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:57:14,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:57:14,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:57:14,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:57:14,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:57:14,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (1/1) ... [2022-12-14 10:57:14,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:57:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:14,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:57:14,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5567006b-d120-4b68-92b2-4f59c559594c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:57:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 10:57:14,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 10:57:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:57:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 10:57:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:57:14,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:57:14,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:57:14,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:57:14,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 10:57:14,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:57:14,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:57:14,778 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 10:57:14,877 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:57:14,878 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:57:14,982 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:57:15,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:57:15,017 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 10:57:15,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:57:15 BoogieIcfgContainer [2022-12-14 10:57:15,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:57:15,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:57:15,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:57:15,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:57:15,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:57:14" (1/3) ... [2022-12-14 10:57:15,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee374bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:57:15, skipping insertion in model container [2022-12-14 10:57:15,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:14" (2/3) ... [2022-12-14 10:57:15,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee374bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:57:15, skipping insertion in model container [2022-12-14 10:57:15,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:57:15" (3/3) ... [2022-12-14 10:57:15,026 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2022-12-14 10:57:15,033 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 10:57:15,042 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:57:15,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:57:15,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 10:57:15,086 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 10:57:15,113 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:57:15,125 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 69 transitions, 143 flow [2022-12-14 10:57:15,128 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 69 transitions, 143 flow [2022-12-14 10:57:15,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 143 flow [2022-12-14 10:57:15,159 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-12-14 10:57:15,159 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 10:57:15,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2022-12-14 10:57:15,164 INFO L119 LiptonReduction]: Number of co-enabled transitions 1092 [2022-12-14 10:57:16,537 INFO L134 LiptonReduction]: Checked pairs total: 877 [2022-12-14 10:57:16,537 INFO L136 LiptonReduction]: Total number of compositions: 69 [2022-12-14 10:57:16,545 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 12 places, 10 transitions, 25 flow [2022-12-14 10:57:16,556 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:57:16,578 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4677d888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:57:16,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-14 10:57:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:16,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:16,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:16,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:57:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash 10934950, now seen corresponding path program 1 times [2022-12-14 10:57:16,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:16,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423783341] [2022-12-14 10:57:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:16,777 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 10:57:16,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:16,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423783341] [2022-12-14 10:57:16,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423783341] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:16,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:16,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174831672] [2022-12-14 10:57:16,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:16,807 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:16,830 INFO L93 Difference]: Finished difference Result 15 states and 24 transitions. [2022-12-14 10:57:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:16,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:16,836 INFO L225 Difference]: With dead ends: 15 [2022-12-14 10:57:16,836 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 10:57:16,837 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 10:57:16,840 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:16,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 10:57:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 10:57:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 10:57:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 24 transitions. [2022-12-14 10:57:16,863 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 24 transitions. Word has length 4 [2022-12-14 10:57:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:16,864 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 24 transitions. [2022-12-14 10:57:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 24 transitions. [2022-12-14 10:57:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:57:16,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:16,865 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 10:57:16,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:57:16,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:57:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:16,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1918517804, now seen corresponding path program 1 times [2022-12-14 10:57:16,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:16,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331252053] [2022-12-14 10:57:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:16,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:16,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:57:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:16,914 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:57:16,914 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:57:16,916 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-14 10:57:16,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-14 10:57:16,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-14 10:57:16,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:57:16,920 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-14 10:57:16,922 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 10:57:16,923 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 10:57:16,942 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 10:57:16,945 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:57:16,946 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 230 flow [2022-12-14 10:57:16,946 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 230 flow [2022-12-14 10:57:16,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 230 flow [2022-12-14 10:57:16,975 INFO L130 PetriNetUnfolder]: 7/133 cut-off events. [2022-12-14 10:57:16,976 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 10:57:16,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 7/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 208 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2022-12-14 10:57:16,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 5304 [2022-12-14 10:57:18,527 INFO L134 LiptonReduction]: Checked pairs total: 6305 [2022-12-14 10:57:18,527 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-12-14 10:57:18,528 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 22 transitions, 56 flow [2022-12-14 10:57:18,542 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 229 states, 221 states have (on average 3.067873303167421) internal successors, (678), 228 states have internal predecessors, (678), 0 states have call successors, (0), 0 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 10:57:18,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:57:18,544 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4677d888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:57:18,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 10:57:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 221 states have (on average 3.067873303167421) internal successors, (678), 228 states have internal predecessors, (678), 0 states have call successors, (0), 0 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 10:57:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:18,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:18,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:18,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-14 10:57:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash 18761591, now seen corresponding path program 1 times [2022-12-14 10:57:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:18,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415091638] [2022-12-14 10:57:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:18,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:18,578 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 10:57:18,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:18,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415091638] [2022-12-14 10:57:18,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415091638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:18,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:18,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475524704] [2022-12-14 10:57:18,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:18,581 INFO L87 Difference]: Start difference. First operand has 229 states, 221 states have (on average 3.067873303167421) internal successors, (678), 228 states have internal predecessors, (678), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:18,618 INFO L93 Difference]: Finished difference Result 168 states and 439 transitions. [2022-12-14 10:57:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:18,621 INFO L225 Difference]: With dead ends: 168 [2022-12-14 10:57:18,622 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 10:57:18,622 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 10:57:18,623 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:18,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 10:57:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-12-14 10:57:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 165 states have (on average 2.6606060606060606) internal successors, (439), 167 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 10:57:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 439 transitions. [2022-12-14 10:57:18,635 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 439 transitions. Word has length 4 [2022-12-14 10:57:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:18,635 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 439 transitions. [2022-12-14 10:57:18,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 439 transitions. [2022-12-14 10:57:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:57:18,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:18,636 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:18,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:57:18,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-14 10:57:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1792320472, now seen corresponding path program 1 times [2022-12-14 10:57:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901565853] [2022-12-14 10:57:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:18,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901565853] [2022-12-14 10:57:18,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901565853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:18,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:18,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:57:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513249355] [2022-12-14 10:57:18,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:18,692 INFO L87 Difference]: Start difference. First operand 168 states and 439 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:18,710 INFO L93 Difference]: Finished difference Result 148 states and 393 transitions. [2022-12-14 10:57:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:18,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:18,711 INFO L225 Difference]: With dead ends: 148 [2022-12-14 10:57:18,711 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 10:57:18,711 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 10:57:18,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:18,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 3 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 10:57:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-12-14 10:57:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.673469387755102) internal successors, (393), 147 states have internal predecessors, (393), 0 states have call successors, (0), 0 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 10:57:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 393 transitions. [2022-12-14 10:57:18,720 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 393 transitions. Word has length 11 [2022-12-14 10:57:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:18,721 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 393 transitions. [2022-12-14 10:57:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 393 transitions. [2022-12-14 10:57:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:57:18,722 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:18,722 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 10:57:18,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:57:18,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-14 10:57:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2117076940, now seen corresponding path program 1 times [2022-12-14 10:57:18,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:18,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161407587] [2022-12-14 10:57:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:18,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:57:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:18,741 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:57:18,741 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:57:18,742 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-14 10:57:18,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-14 10:57:18,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-14 10:57:18,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-14 10:57:18,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:57:18,743 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 10:57:18,743 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 10:57:18,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 10:57:18,757 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 10:57:18,758 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:57:18,758 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 149 transitions, 319 flow [2022-12-14 10:57:18,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 149 transitions, 319 flow [2022-12-14 10:57:18,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 319 flow [2022-12-14 10:57:18,780 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-12-14 10:57:18,780 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 10:57:18,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 186 events. 10/186 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 423 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-12-14 10:57:18,786 INFO L119 LiptonReduction]: Number of co-enabled transitions 12636 [2022-12-14 10:57:20,841 INFO L134 LiptonReduction]: Checked pairs total: 14845 [2022-12-14 10:57:20,841 INFO L136 LiptonReduction]: Total number of compositions: 146 [2022-12-14 10:57:20,841 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 30 transitions, 81 flow [2022-12-14 10:57:20,878 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1425 states, 1406 states have (on average 4.166429587482219) internal successors, (5858), 1424 states have internal predecessors, (5858), 0 states have call successors, (0), 0 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 10:57:20,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:57:20,879 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4677d888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:57:20,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-14 10:57:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 1425 states, 1406 states have (on average 4.166429587482219) internal successors, (5858), 1424 states have internal predecessors, (5858), 0 states have call successors, (0), 0 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 10:57:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:20,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:20,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:20,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 10:57:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:20,883 INFO L85 PathProgramCache]: Analyzing trace with hash 29088359, now seen corresponding path program 1 times [2022-12-14 10:57:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056065065] [2022-12-14 10:57:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:20,904 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 10:57:20,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056065065] [2022-12-14 10:57:20,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056065065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:20,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:20,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221897364] [2022-12-14 10:57:20,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:20,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:20,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:20,911 INFO L87 Difference]: Start difference. First operand has 1425 states, 1406 states have (on average 4.166429587482219) internal successors, (5858), 1424 states have internal predecessors, (5858), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:20,963 INFO L93 Difference]: Finished difference Result 1034 states and 3679 transitions. [2022-12-14 10:57:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:20,970 INFO L225 Difference]: With dead ends: 1034 [2022-12-14 10:57:20,971 INFO L226 Difference]: Without dead ends: 1034 [2022-12-14 10:57:20,971 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 10:57:20,971 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:20,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-12-14 10:57:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2022-12-14 10:57:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1027 states have (on average 3.5822784810126582) internal successors, (3679), 1033 states have internal predecessors, (3679), 0 states have call successors, (0), 0 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 10:57:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3679 transitions. [2022-12-14 10:57:21,022 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3679 transitions. Word has length 4 [2022-12-14 10:57:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:21,022 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 3679 transitions. [2022-12-14 10:57:21,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3679 transitions. [2022-12-14 10:57:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:57:21,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,023 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:57:21,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 10:57:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1673905959, now seen corresponding path program 1 times [2022-12-14 10:57:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799119208] [2022-12-14 10:57:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:21,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799119208] [2022-12-14 10:57:21,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799119208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:21,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:21,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:57:21,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54688347] [2022-12-14 10:57:21,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:21,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:21,057 INFO L87 Difference]: Start difference. First operand 1034 states and 3679 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:21,084 INFO L93 Difference]: Finished difference Result 748 states and 2718 transitions. [2022-12-14 10:57:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:21,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:21,088 INFO L225 Difference]: With dead ends: 748 [2022-12-14 10:57:21,088 INFO L226 Difference]: Without dead ends: 748 [2022-12-14 10:57:21,088 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 10:57:21,088 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:21,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 3 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-12-14 10:57:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-12-14 10:57:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.63855421686747) internal successors, (2718), 747 states have internal predecessors, (2718), 0 states have call successors, (0), 0 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 10:57:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2718 transitions. [2022-12-14 10:57:21,107 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2718 transitions. Word has length 11 [2022-12-14 10:57:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:21,107 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2718 transitions. [2022-12-14 10:57:21,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2718 transitions. [2022-12-14 10:57:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:57:21,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,108 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:57:21,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 10:57:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,109 INFO L85 PathProgramCache]: Analyzing trace with hash 977187739, now seen corresponding path program 1 times [2022-12-14 10:57:21,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041473971] [2022-12-14 10:57:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:21,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:57:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:21,127 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:57:21,128 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:57:21,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-14 10:57:21,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-14 10:57:21,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-14 10:57:21,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-14 10:57:21,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-14 10:57:21,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:57:21,129 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 10:57:21,129 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 10:57:21,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 10:57:21,153 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 10:57:21,155 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:57:21,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 189 transitions, 410 flow [2022-12-14 10:57:21,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 189 transitions, 410 flow [2022-12-14 10:57:21,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 410 flow [2022-12-14 10:57:21,197 INFO L130 PetriNetUnfolder]: 13/239 cut-off events. [2022-12-14 10:57:21,197 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-14 10:57:21,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 239 events. 13/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 194. Up to 10 conditions per place. [2022-12-14 10:57:21,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 23088 [2022-12-14 10:57:23,624 INFO L134 LiptonReduction]: Checked pairs total: 27363 [2022-12-14 10:57:23,624 INFO L136 LiptonReduction]: Total number of compositions: 191 [2022-12-14 10:57:23,624 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 38 transitions, 108 flow [2022-12-14 10:57:23,886 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8729 states, 8687 states have (on average 5.304247726487856) internal successors, (46078), 8728 states have internal predecessors, (46078), 0 states have call successors, (0), 0 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 10:57:23,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:57:23,887 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4677d888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:57:23,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 10:57:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 8729 states, 8687 states have (on average 5.304247726487856) internal successors, (46078), 8728 states have internal predecessors, (46078), 0 states have call successors, (0), 0 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 10:57:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:23,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:23,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:23,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 10:57:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash 41631806, now seen corresponding path program 1 times [2022-12-14 10:57:23,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512933351] [2022-12-14 10:57:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:23,918 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 10:57:23,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:23,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512933351] [2022-12-14 10:57:23,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512933351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:23,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:23,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:23,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985777852] [2022-12-14 10:57:23,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:23,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:23,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:23,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:23,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:23,937 INFO L87 Difference]: Start difference. First operand has 8729 states, 8687 states have (on average 5.304247726487856) internal successors, (46078), 8728 states have internal predecessors, (46078), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:24,108 INFO L93 Difference]: Finished difference Result 6460 states and 29327 transitions. [2022-12-14 10:57:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:24,179 INFO L225 Difference]: With dead ends: 6460 [2022-12-14 10:57:24,179 INFO L226 Difference]: Without dead ends: 6460 [2022-12-14 10:57:24,180 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 10:57:24,180 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:24,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2022-12-14 10:57:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 6460. [2022-12-14 10:57:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6460 states, 6445 states have (on average 4.550349107835531) internal successors, (29327), 6459 states have internal predecessors, (29327), 0 states have call successors, (0), 0 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 10:57:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 29327 transitions. [2022-12-14 10:57:24,441 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 29327 transitions. Word has length 4 [2022-12-14 10:57:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:24,441 INFO L495 AbstractCegarLoop]: Abstraction has 6460 states and 29327 transitions. [2022-12-14 10:57:24,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 29327 transitions. [2022-12-14 10:57:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:57:24,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:24,443 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:24,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:57:24,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 10:57:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1653150666, now seen corresponding path program 1 times [2022-12-14 10:57:24,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:24,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875056583] [2022-12-14 10:57:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:24,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:24,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875056583] [2022-12-14 10:57:24,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875056583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:24,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:24,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:57:24,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724914729] [2022-12-14 10:57:24,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:24,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:24,515 INFO L87 Difference]: Start difference. First operand 6460 states and 29327 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:24,598 INFO L93 Difference]: Finished difference Result 3748 states and 17343 transitions. [2022-12-14 10:57:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:24,619 INFO L225 Difference]: With dead ends: 3748 [2022-12-14 10:57:24,619 INFO L226 Difference]: Without dead ends: 3748 [2022-12-14 10:57:24,619 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 10:57:24,619 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:24,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-12-14 10:57:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3748. [2022-12-14 10:57:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 4.628502802241793) internal successors, (17343), 3747 states have internal predecessors, (17343), 0 states have call successors, (0), 0 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 10:57:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 17343 transitions. [2022-12-14 10:57:24,738 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 17343 transitions. Word has length 11 [2022-12-14 10:57:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:24,739 INFO L495 AbstractCegarLoop]: Abstraction has 3748 states and 17343 transitions. [2022-12-14 10:57:24,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 17343 transitions. [2022-12-14 10:57:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 10:57:24,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:24,742 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:24,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:57:24,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 10:57:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:24,743 INFO L85 PathProgramCache]: Analyzing trace with hash 361712936, now seen corresponding path program 1 times [2022-12-14 10:57:24,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:24,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274840336] [2022-12-14 10:57:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:24,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:24,754 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:57:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:24,766 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:57:24,766 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:57:24,766 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-14 10:57:24,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-14 10:57:24,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-14 10:57:24,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-14 10:57:24,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-14 10:57:24,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-14 10:57:24,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:57:24,768 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 10:57:24,768 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 10:57:24,768 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-14 10:57:24,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 10:57:24,791 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:57:24,791 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 229 transitions, 503 flow [2022-12-14 10:57:24,792 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 229 transitions, 503 flow [2022-12-14 10:57:24,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 229 transitions, 503 flow [2022-12-14 10:57:24,865 INFO L130 PetriNetUnfolder]: 16/292 cut-off events. [2022-12-14 10:57:24,865 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-14 10:57:24,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 292 events. 16/292 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 894 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 252. Up to 12 conditions per place. [2022-12-14 10:57:24,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 36660 [2022-12-14 10:57:28,352 INFO L134 LiptonReduction]: Checked pairs total: 43106 [2022-12-14 10:57:28,352 INFO L136 LiptonReduction]: Total number of compositions: 230 [2022-12-14 10:57:28,352 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 46 transitions, 137 flow [2022-12-14 10:57:29,732 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53065 states, 52976 states have (on average 6.462662337662338) internal successors, (342366), 53064 states have internal predecessors, (342366), 0 states have call successors, (0), 0 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 10:57:29,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:57:29,733 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4677d888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:57:29,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-14 10:57:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 53065 states, 52976 states have (on average 6.462662337662338) internal successors, (342366), 53064 states have internal predecessors, (342366), 0 states have call successors, (0), 0 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 10:57:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:29,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:29,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:29,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-14 10:57:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 56895687, now seen corresponding path program 1 times [2022-12-14 10:57:29,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:29,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907453961] [2022-12-14 10:57:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:29,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:29,820 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 10:57:29,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907453961] [2022-12-14 10:57:29,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907453961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:29,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:29,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:29,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480870990] [2022-12-14 10:57:29,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:29,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:29,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:29,889 INFO L87 Difference]: Start difference. First operand has 53065 states, 52976 states have (on average 6.462662337662338) internal successors, (342366), 53064 states have internal predecessors, (342366), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:30,358 INFO L93 Difference]: Finished difference Result 40314 states and 223471 transitions. [2022-12-14 10:57:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:30,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:30,692 INFO L225 Difference]: With dead ends: 40314 [2022-12-14 10:57:30,692 INFO L226 Difference]: Without dead ends: 40314 [2022-12-14 10:57:30,693 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 10:57:30,693 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:30,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40314 states. [2022-12-14 10:57:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40314 to 40314. [2022-12-14 10:57:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40314 states, 40283 states have (on average 5.547526251768736) internal successors, (223471), 40313 states have internal predecessors, (223471), 0 states have call successors, (0), 0 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 10:57:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40314 states to 40314 states and 223471 transitions. [2022-12-14 10:57:32,104 INFO L78 Accepts]: Start accepts. Automaton has 40314 states and 223471 transitions. Word has length 4 [2022-12-14 10:57:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:32,104 INFO L495 AbstractCegarLoop]: Abstraction has 40314 states and 223471 transitions. [2022-12-14 10:57:32,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 40314 states and 223471 transitions. [2022-12-14 10:57:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:57:32,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:32,104 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:32,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:57:32,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-14 10:57:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:32,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1299532055, now seen corresponding path program 1 times [2022-12-14 10:57:32,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:32,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651350608] [2022-12-14 10:57:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:32,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:32,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:32,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651350608] [2022-12-14 10:57:32,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651350608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:32,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:32,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:57:32,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884004929] [2022-12-14 10:57:32,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:32,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:32,130 INFO L87 Difference]: Start difference. First operand 40314 states and 223471 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:32,433 INFO L93 Difference]: Finished difference Result 18748 states and 105468 transitions. [2022-12-14 10:57:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:32,536 INFO L225 Difference]: With dead ends: 18748 [2022-12-14 10:57:32,537 INFO L226 Difference]: Without dead ends: 18748 [2022-12-14 10:57:32,537 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 10:57:32,538 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:32,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:57:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18748 states. [2022-12-14 10:57:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18748 to 18748. [2022-12-14 10:57:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18748 states, 18747 states have (on average 5.62586013762202) internal successors, (105468), 18747 states have internal predecessors, (105468), 0 states have call successors, (0), 0 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 10:57:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18748 states to 18748 states and 105468 transitions. [2022-12-14 10:57:33,294 INFO L78 Accepts]: Start accepts. Automaton has 18748 states and 105468 transitions. Word has length 11 [2022-12-14 10:57:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:33,294 INFO L495 AbstractCegarLoop]: Abstraction has 18748 states and 105468 transitions. [2022-12-14 10:57:33,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 10:57:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 18748 states and 105468 transitions. [2022-12-14 10:57:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 10:57:33,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:33,300 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:33,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:57:33,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-14 10:57:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1100763987, now seen corresponding path program 1 times [2022-12-14 10:57:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:33,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721079354] [2022-12-14 10:57:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:33,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:33,313 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:57:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:57:33,323 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:57:33,324 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:57:33,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-14 10:57:33,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-14 10:57:33,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-14 10:57:33,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-12-14 10:57:33,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-12-14 10:57:33,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-14 10:57:33,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-14 10:57:33,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:57:33,325 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 10:57:33,325 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 10:57:33,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-12-14 10:57:33,350 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 10:57:33,352 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:57:33,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 269 transitions, 598 flow [2022-12-14 10:57:33,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 269 transitions, 598 flow [2022-12-14 10:57:33,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 269 transitions, 598 flow [2022-12-14 10:57:33,412 INFO L130 PetriNetUnfolder]: 19/345 cut-off events. [2022-12-14 10:57:33,412 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-14 10:57:33,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 345 events. 19/345 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1134 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 311. Up to 14 conditions per place. [2022-12-14 10:57:33,430 INFO L119 LiptonReduction]: Number of co-enabled transitions 53352 [2022-12-14 10:57:37,052 INFO L134 LiptonReduction]: Checked pairs total: 61888 [2022-12-14 10:57:37,052 INFO L136 LiptonReduction]: Total number of compositions: 268 [2022-12-14 10:57:37,053 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 54 transitions, 168 flow [2022-12-14 10:57:48,976 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 321129 states, 320945 states have (on average 7.630210783779153) internal successors, (2448878), 321128 states have internal predecessors, (2448878), 0 states have call successors, (0), 0 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 10:57:48,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:57:48,977 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4677d888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:57:48,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-14 10:57:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 321129 states, 320945 states have (on average 7.630210783779153) internal successors, (2448878), 321128 states have internal predecessors, (2448878), 0 states have call successors, (0), 0 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 10:57:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:49,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:49,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:49,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-14 10:57:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 74604931, now seen corresponding path program 1 times [2022-12-14 10:57:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:49,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149293798] [2022-12-14 10:57:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:49,526 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 10:57:49,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149293798] [2022-12-14 10:57:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149293798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:49,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:49,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:49,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323681977] [2022-12-14 10:57:49,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:50,080 INFO L87 Difference]: Start difference. First operand has 321129 states, 320945 states have (on average 7.630210783779153) internal successors, (2448878), 321128 states have internal predecessors, (2448878), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:53,988 INFO L93 Difference]: Finished difference Result 249764 states and 1637767 transitions. [2022-12-14 10:57:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:53,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:56,356 INFO L225 Difference]: With dead ends: 249764 [2022-12-14 10:57:56,356 INFO L226 Difference]: Without dead ends: 249764 [2022-12-14 10:57:56,356 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 10:57:56,357 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:56,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 6 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249764 states. [2022-12-14 10:58:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249764 to 249764. [2022-12-14 10:58:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249764 states, 249701 states have (on average 6.558912459301324) internal successors, (1637767), 249763 states have internal predecessors, (1637767), 0 states have call successors, (0), 0 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 10:58:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249764 states to 249764 states and 1637767 transitions. [2022-12-14 10:58:07,895 INFO L78 Accepts]: Start accepts. Automaton has 249764 states and 1637767 transitions. Word has length 4 [2022-12-14 10:58:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:07,895 INFO L495 AbstractCegarLoop]: Abstraction has 249764 states and 1637767 transitions. [2022-12-14 10:58:07,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 249764 states and 1637767 transitions. [2022-12-14 10:58:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:58:07,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:07,896 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 10:58:07,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-14 10:58:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash 917523628, now seen corresponding path program 1 times [2022-12-14 10:58:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:07,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170853151] [2022-12-14 10:58:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:07,919 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 10:58:07,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170853151] [2022-12-14 10:58:07,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170853151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:58:07,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:58:07,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:58:07,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528159552] [2022-12-14 10:58:07,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:58:07,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:58:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:58:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:58:07,921 INFO L87 Difference]: Start difference. First operand 249764 states and 1637767 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 10:58:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:09,100 INFO L93 Difference]: Finished difference Result 93748 states and 621093 transitions. [2022-12-14 10:58:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:58:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10:58:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:09,707 INFO L225 Difference]: With dead ends: 93748 [2022-12-14 10:58:09,707 INFO L226 Difference]: Without dead ends: 93748 [2022-12-14 10:58:09,708 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 10:58:09,708 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:09,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:58:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93748 states. [2022-12-14 10:58:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93748 to 93748. [2022-12-14 10:58:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93748 states, 93747 states have (on average 6.625204006528209) internal successors, (621093), 93747 states have internal predecessors, (621093), 0 states have call successors, (0), 0 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 10:58:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93748 states to 93748 states and 621093 transitions. [2022-12-14 10:58:13,974 INFO L78 Accepts]: Start accepts. Automaton has 93748 states and 621093 transitions. Word has length 11 [2022-12-14 10:58:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:13,975 INFO L495 AbstractCegarLoop]: Abstraction has 93748 states and 621093 transitions. [2022-12-14 10:58:13,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 10:58:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 93748 states and 621093 transitions. [2022-12-14 10:58:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 10:58:13,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:13,992 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 10:58:13,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-14 10:58:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1782166600, now seen corresponding path program 1 times [2022-12-14 10:58:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946772291] [2022-12-14 10:58:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:58:14,003 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:58:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:58:14,011 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:58:14,012 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-12-14 10:58:14,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-12-14 10:58:14,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 10:58:14,013 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 10:58:14,013 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 10:58:14,013 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-12-14 10:58:14,045 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 10:58:14,048 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:58:14,048 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 309 places, 309 transitions, 695 flow [2022-12-14 10:58:14,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 309 places, 309 transitions, 695 flow [2022-12-14 10:58:14,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 309 transitions, 695 flow [2022-12-14 10:58:14,108 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-12-14 10:58:14,108 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-14 10:58:14,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 398 events. 22/398 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1379 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 372. Up to 16 conditions per place. [2022-12-14 10:58:14,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 73164 [2022-12-14 10:58:18,574 INFO L134 LiptonReduction]: Checked pairs total: 86351 [2022-12-14 10:58:18,574 INFO L136 LiptonReduction]: Total number of compositions: 310 [2022-12-14 10:58:18,575 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 62 transitions, 201 flow