./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 38b53e6a 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_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R --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 Automizer --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-38b53e6 [2022-11-25 15:32:06,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:32:06,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:32:06,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:32:06,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:32:06,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:32:06,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:32:06,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:32:06,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:32:06,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:32:06,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:32:06,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:32:06,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:32:06,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:32:06,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:32:06,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:32:06,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:32:06,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:32:06,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:32:06,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:32:06,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:32:06,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:32:06,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:32:06,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:32:06,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:32:06,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:32:06,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:32:06,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:32:06,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:32:06,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:32:06,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:32:06,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:32:06,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:32:06,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:32:06,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:32:06,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:32:06,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:32:06,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:32:06,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:32:06,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:32:06,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:32:06,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:32:06,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:32:06,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:32:06,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:32:06,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:32:06,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:32:06,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:32:06,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:32:06,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:32:06,482 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:32:06,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:32:06,484 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:32:06,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:32:06,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:32:06,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:32:06,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:32:06,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:32:06,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:32:06,485 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:32:06,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:32:06,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:32:06,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:32:06,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:32:06,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:32:06,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:32:06,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:32:06,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:32:06,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:32:06,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:32:06,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:32:06,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:32:06,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:32:06,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:32:06,490 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:32:06,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:32:06,490 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2022-11-25 15:32:06,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:32:06,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:32:06,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:32:06,826 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:32:06,826 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:32:06,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-11-25 15:32:09,864 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:32:10,220 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:32:10,220 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-11-25 15:32:10,241 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/data/65624634e/9bcc7d0d5d38479fa70c611df79bfa6b/FLAG381265b79 [2022-11-25 15:32:10,258 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/data/65624634e/9bcc7d0d5d38479fa70c611df79bfa6b [2022-11-25 15:32:10,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:32:10,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:32:10,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:32:10,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:32:10,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:32:10,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:10,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52de13fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10, skipping insertion in model container [2022-11-25 15:32:10,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:10,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:32:10,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:32:10,580 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 15:32:10,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:10,804 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_bdd92ef6-4777-408c-b1a2-33ccd083ca60/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-11-25 15:32:10,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:10,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:10,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:10,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:32:10,833 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:32:10,858 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 15:32:10,888 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:10,889 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_bdd92ef6-4777-408c-b1a2-33ccd083ca60/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-11-25 15:32:10,890 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:10,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:10,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:10,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:32:10,924 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:32:10,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10 WrapperNode [2022-11-25 15:32:10,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:32:10,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:32:10,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:32:10,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:32:10,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:10,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:10,983 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2022-11-25 15:32:10,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:32:10,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:32:10,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:32:10,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:32:10,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:10,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:10,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:10,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:11,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:11,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:11,007 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:11,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:11,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:32:11,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:32:11,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:32:11,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:32:11,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (1/1) ... [2022-11-25 15:32:11,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:32:11,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:11,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:32:11,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd92ef6-4777-408c-b1a2-33ccd083ca60/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:32:11,099 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 15:32:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 15:32:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:32:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:32:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:32:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:32:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:32:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:32:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:32:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:32:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:32:11,104 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:32:11,223 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:32:11,225 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:32:11,470 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:32:11,513 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:32:11,513 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 15:32:11,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:32:11 BoogieIcfgContainer [2022-11-25 15:32:11,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:32:11,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:32:11,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:32:11,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:32:11,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:32:10" (1/3) ... [2022-11-25 15:32:11,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d5c36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:32:11, skipping insertion in model container [2022-11-25 15:32:11,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:10" (2/3) ... [2022-11-25 15:32:11,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d5c36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:32:11, skipping insertion in model container [2022-11-25 15:32:11,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:32:11" (3/3) ... [2022-11-25 15:32:11,526 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2022-11-25 15:32:11,535 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:32:11,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:32:11,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:32:11,546 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:32:11,598 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:32:11,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 143 flow [2022-11-25 15:32:11,695 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-11-25 15:32:11,696 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:11,703 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. [2022-11-25 15:32:11,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 143 flow [2022-11-25 15:32:11,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 69 transitions, 143 flow [2022-11-25 15:32:11,716 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:11,733 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 69 transitions, 143 flow [2022-11-25 15:32:11,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 69 transitions, 143 flow [2022-11-25 15:32:11,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 143 flow [2022-11-25 15:32:11,758 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-11-25 15:32:11,758 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:11,759 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. [2022-11-25 15:32:11,760 INFO L119 LiptonReduction]: Number of co-enabled transitions 1092 [2022-11-25 15:32:14,027 INFO L134 LiptonReduction]: Checked pairs total: 924 [2022-11-25 15:32:14,027 INFO L136 LiptonReduction]: Total number of compositions: 68 [2022-11-25 15:32:14,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:32:14,074 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, 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;@19f04490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:32:14,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 15:32:14,079 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 15:32:14,079 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:14,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:14,080 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:32:14,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:32:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 10935913, now seen corresponding path program 1 times [2022-11-25 15:32:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:14,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646467346] [2022-11-25 15:32:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:14,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:14,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646467346] [2022-11-25 15:32:14,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646467346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:14,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:14,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:32:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859022988] [2022-11-25 15:32:14,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:14,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:14,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:14,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2022-11-25 15:32:14,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:14,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:14,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2022-11-25 15:32:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:14,439 INFO L130 PetriNetUnfolder]: 7/20 cut-off events. [2022-11-25 15:32:14,439 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:14,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 2 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 13 conditions per place. [2022-11-25 15:32:14,442 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2022-11-25 15:32:14,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 43 flow [2022-11-25 15:32:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:14,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2022-11-25 15:32:14,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45985401459854014 [2022-11-25 15:32:14,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2022-11-25 15:32:14,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2022-11-25 15:32:14,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:14,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2022-11-25 15:32:14,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:14,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:14,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:14,485 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 3 states and 189 transitions. [2022-11-25 15:32:14,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 43 flow [2022-11-25 15:32:14,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:32:14,491 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 25 flow [2022-11-25 15:32:14,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=25, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2022-11-25 15:32:14,498 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, 0 predicate places. [2022-11-25 15:32:14,499 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 25 flow [2022-11-25 15:32:14,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:14,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:14,503 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 15:32:14,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:32:14,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:32:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1919441356, now seen corresponding path program 1 times [2022-11-25 15:32:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:14,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894283921] [2022-11-25 15:32:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:14,563 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:32:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:14,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:32:14,595 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:32:14,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 15:32:14,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 15:32:14,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 15:32:14,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:32:14,601 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:32:14,603 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:32:14,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 15:32:14,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:32:14,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 230 flow [2022-11-25 15:32:14,733 INFO L130 PetriNetUnfolder]: 7/133 cut-off events. [2022-11-25 15:32:14,737 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:32:14,740 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 207 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. [2022-11-25 15:32:14,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 230 flow [2022-11-25 15:32:14,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 109 transitions, 230 flow [2022-11-25 15:32:14,742 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:14,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 230 flow [2022-11-25 15:32:14,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 230 flow [2022-11-25 15:32:14,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 230 flow [2022-11-25 15:32:14,784 INFO L130 PetriNetUnfolder]: 7/133 cut-off events. [2022-11-25 15:32:14,784 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:32:14,789 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 207 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. [2022-11-25 15:32:14,792 INFO L119 LiptonReduction]: Number of co-enabled transitions 5304 [2022-11-25 15:32:17,522 INFO L134 LiptonReduction]: Checked pairs total: 6255 [2022-11-25 15:32:17,523 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-11-25 15:32:17,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:32:17,533 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=PETRI_NET, 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;@19f04490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:32:17,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 15:32:17,536 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 15:32:17,536 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:17,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:17,537 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:32:17,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:32:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash 18726956, now seen corresponding path program 1 times [2022-11-25 15:32:17,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:17,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640511085] [2022-11-25 15:32:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:17,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:17,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:17,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640511085] [2022-11-25 15:32:17,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640511085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:17,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:17,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:32:17,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804231218] [2022-11-25 15:32:17,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:17,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:17,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:17,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:17,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 216 [2022-11-25 15:32:17,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:17,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:17,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 216 [2022-11-25 15:32:17,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:17,731 INFO L130 PetriNetUnfolder]: 94/175 cut-off events. [2022-11-25 15:32:17,731 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 15:32:17,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 175 events. 94/175 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 666 event pairs, 28 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 168. Up to 105 conditions per place. [2022-11-25 15:32:17,733 INFO L137 encePairwiseOnDemand]: 208/216 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2022-11-25 15:32:17,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 127 flow [2022-11-25 15:32:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-11-25 15:32:17,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2022-11-25 15:32:17,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-11-25 15:32:17,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-11-25 15:32:17,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:17,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-11-25 15:32:17,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:17,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:17,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:17,742 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 56 flow. Second operand 3 states and 310 transitions. [2022-11-25 15:32:17,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 127 flow [2022-11-25 15:32:17,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 125 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 15:32:17,744 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 69 flow [2022-11-25 15:32:17,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-11-25 15:32:17,745 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2022-11-25 15:32:17,745 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 69 flow [2022-11-25 15:32:17,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:17,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:17,746 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 15:32:17,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:32:17,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:32:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1377508917, now seen corresponding path program 1 times [2022-11-25 15:32:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:17,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117642495] [2022-11-25 15:32:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:17,764 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:32:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:17,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:32:17,791 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:32:17,791 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 15:32:17,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 15:32:17,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 15:32:17,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 15:32:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:32:17,793 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:32:17,793 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:32:17,794 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 15:32:17,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:32:17,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 319 flow [2022-11-25 15:32:17,876 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-11-25 15:32:17,876 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:32:17,879 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 424 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. [2022-11-25 15:32:17,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 149 transitions, 319 flow [2022-11-25 15:32:17,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 149 transitions, 319 flow [2022-11-25 15:32:17,881 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:17,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 149 transitions, 319 flow [2022-11-25 15:32:17,885 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 149 transitions, 319 flow [2022-11-25 15:32:17,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 319 flow [2022-11-25 15:32:17,915 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-11-25 15:32:17,915 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:32:17,918 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 424 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. [2022-11-25 15:32:17,925 INFO L119 LiptonReduction]: Number of co-enabled transitions 12636 [2022-11-25 15:32:21,496 INFO L134 LiptonReduction]: Checked pairs total: 15087 [2022-11-25 15:32:21,496 INFO L136 LiptonReduction]: Total number of compositions: 148 [2022-11-25 15:32:21,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:32:21,499 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=PETRI_NET, 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;@19f04490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:32:21,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 15:32:21,501 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 15:32:21,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:21,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:21,502 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:32:21,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 15:32:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash 28909581, now seen corresponding path program 1 times [2022-11-25 15:32:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:21,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574907983] [2022-11-25 15:32:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:21,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:21,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574907983] [2022-11-25 15:32:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574907983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:21,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:21,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:32:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576169367] [2022-11-25 15:32:21,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:21,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:21,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:21,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 297 [2022-11-25 15:32:21,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:21,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:21,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 297 [2022-11-25 15:32:21,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:21,834 INFO L130 PetriNetUnfolder]: 976/1439 cut-off events. [2022-11-25 15:32:21,835 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2022-11-25 15:32:21,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 1439 events. 976/1439 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6684 event pairs, 268 based on Foata normal form. 0/1101 useless extension candidates. Maximal degree in co-relation 736. Up to 1147 conditions per place. [2022-11-25 15:32:21,844 INFO L137 encePairwiseOnDemand]: 286/297 looper letters, 34 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2022-11-25 15:32:21,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 191 flow [2022-11-25 15:32:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2022-11-25 15:32:21,848 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47586980920314254 [2022-11-25 15:32:21,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2022-11-25 15:32:21,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2022-11-25 15:32:21,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:21,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2022-11-25 15:32:21,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:21,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:21,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:21,854 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 81 flow. Second operand 3 states and 424 transitions. [2022-11-25 15:32:21,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 191 flow [2022-11-25 15:32:21,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 183 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 15:32:21,856 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 97 flow [2022-11-25 15:32:21,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-11-25 15:32:21,857 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-11-25 15:32:21,858 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 97 flow [2022-11-25 15:32:21,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:21,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:21,858 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:21,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:32:21,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 15:32:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash -582621672, now seen corresponding path program 1 times [2022-11-25 15:32:21,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876149603] [2022-11-25 15:32:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876149603] [2022-11-25 15:32:21,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876149603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:21,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:21,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:32:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833461649] [2022-11-25 15:32:21,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:21,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 297 [2022-11-25 15:32:21,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:21,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:21,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 297 [2022-11-25 15:32:21,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:22,118 INFO L130 PetriNetUnfolder]: 736/1112 cut-off events. [2022-11-25 15:32:22,119 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-25 15:32:22,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2518 conditions, 1112 events. 736/1112 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4711 event pairs, 516 based on Foata normal form. 104/1187 useless extension candidates. Maximal degree in co-relation 812. Up to 1048 conditions per place. [2022-11-25 15:32:22,126 INFO L137 encePairwiseOnDemand]: 293/297 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-25 15:32:22,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 131 flow [2022-11-25 15:32:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-11-25 15:32:22,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44668911335578004 [2022-11-25 15:32:22,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-11-25 15:32:22,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-11-25 15:32:22,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:22,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-11-25 15:32:22,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:22,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:22,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:22,133 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 97 flow. Second operand 3 states and 398 transitions. [2022-11-25 15:32:22,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 131 flow [2022-11-25 15:32:22,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:32:22,135 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 83 flow [2022-11-25 15:32:22,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-11-25 15:32:22,137 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-11-25 15:32:22,137 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 83 flow [2022-11-25 15:32:22,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:22,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:22,138 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 15:32:22,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:32:22,138 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)] === [2022-11-25 15:32:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash -763775154, now seen corresponding path program 1 times [2022-11-25 15:32:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:22,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856458067] [2022-11-25 15:32:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:22,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:22,154 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:32:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:22,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:32:22,168 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:32:22,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 15:32:22,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 15:32:22,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 15:32:22,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 15:32:22,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 15:32:22,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:32:22,170 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 15:32:22,171 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:32:22,171 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 15:32:22,201 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:32:22,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 410 flow [2022-11-25 15:32:22,238 INFO L130 PetriNetUnfolder]: 13/239 cut-off events. [2022-11-25 15:32:22,238 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 15:32:22,240 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 664 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. [2022-11-25 15:32:22,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 189 transitions, 410 flow [2022-11-25 15:32:22,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 189 transitions, 410 flow [2022-11-25 15:32:22,243 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:22,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 189 transitions, 410 flow [2022-11-25 15:32:22,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 189 transitions, 410 flow [2022-11-25 15:32:22,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 410 flow [2022-11-25 15:32:22,277 INFO L130 PetriNetUnfolder]: 13/239 cut-off events. [2022-11-25 15:32:22,277 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 15:32:22,279 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 664 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. [2022-11-25 15:32:22,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 23088 [2022-11-25 15:32:26,820 INFO L134 LiptonReduction]: Checked pairs total: 27547 [2022-11-25 15:32:26,820 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-11-25 15:32:26,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:32:26,822 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=PETRI_NET, 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;@19f04490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:32:26,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 15:32:26,824 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 15:32:26,824 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:26,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:26,824 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:32:26,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 15:32:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:26,825 INFO L85 PathProgramCache]: Analyzing trace with hash 41947054, now seen corresponding path program 1 times [2022-11-25 15:32:26,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:26,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677244463] [2022-11-25 15:32:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:26,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:26,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:26,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677244463] [2022-11-25 15:32:26,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677244463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:26,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:26,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:32:26,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253913574] [2022-11-25 15:32:26,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:26,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:26,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:26,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:26,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 379 [2022-11-25 15:32:26,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:26,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:26,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 379 [2022-11-25 15:32:26,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:28,384 INFO L130 PetriNetUnfolder]: 8706/11483 cut-off events. [2022-11-25 15:32:28,384 INFO L131 PetriNetUnfolder]: For 2094/2094 co-relation queries the response was YES. [2022-11-25 15:32:28,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 11483 events. 8706/11483 cut-off events. For 2094/2094 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 58284 event pairs, 2414 based on Foata normal form. 0/8462 useless extension candidates. Maximal degree in co-relation 3047. Up to 10363 conditions per place. [2022-11-25 15:32:28,476 INFO L137 encePairwiseOnDemand]: 365/379 looper letters, 45 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2022-11-25 15:32:28,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 259 flow [2022-11-25 15:32:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2022-11-25 15:32:28,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731750219876869 [2022-11-25 15:32:28,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2022-11-25 15:32:28,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2022-11-25 15:32:28,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:28,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2022-11-25 15:32:28,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:28,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:28,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:28,485 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 538 transitions. [2022-11-25 15:32:28,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 259 flow [2022-11-25 15:32:28,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 241 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-25 15:32:28,491 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 125 flow [2022-11-25 15:32:28,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-11-25 15:32:28,493 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2022-11-25 15:32:28,494 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 125 flow [2022-11-25 15:32:28,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:28,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:28,494 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:28,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:32:28,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 15:32:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:28,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1339686561, now seen corresponding path program 1 times [2022-11-25 15:32:28,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:28,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569927189] [2022-11-25 15:32:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:28,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569927189] [2022-11-25 15:32:28,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569927189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:28,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:28,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:32:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639371586] [2022-11-25 15:32:28,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:28,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:28,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:28,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 379 [2022-11-25 15:32:28,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:28,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:28,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 379 [2022-11-25 15:32:28,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:29,490 INFO L130 PetriNetUnfolder]: 5236/7096 cut-off events. [2022-11-25 15:32:29,490 INFO L131 PetriNetUnfolder]: For 1708/1708 co-relation queries the response was YES. [2022-11-25 15:32:29,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15910 conditions, 7096 events. 5236/7096 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33264 event pairs, 3688 based on Foata normal form. 888/7846 useless extension candidates. Maximal degree in co-relation 5470. Up to 6798 conditions per place. [2022-11-25 15:32:29,530 INFO L137 encePairwiseOnDemand]: 374/379 looper letters, 29 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2022-11-25 15:32:29,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 169 flow [2022-11-25 15:32:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-11-25 15:32:29,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44327176781002636 [2022-11-25 15:32:29,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-11-25 15:32:29,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-11-25 15:32:29,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:29,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-11-25 15:32:29,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:29,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:29,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:29,538 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 125 flow. Second operand 3 states and 504 transitions. [2022-11-25 15:32:29,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 169 flow [2022-11-25 15:32:29,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:32:29,543 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 106 flow [2022-11-25 15:32:29,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-11-25 15:32:29,544 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2022-11-25 15:32:29,544 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 106 flow [2022-11-25 15:32:29,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:29,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:29,545 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:32:29,545 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)] === [2022-11-25 15:32:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1816389739, now seen corresponding path program 1 times [2022-11-25 15:32:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:29,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461799241] [2022-11-25 15:32:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:29,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:29,558 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:32:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:29,571 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:32:29,571 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:32:29,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 15:32:29,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-25 15:32:29,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-25 15:32:29,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-25 15:32:29,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-25 15:32:29,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-25 15:32:29,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 15:32:29,573 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 15:32:29,574 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:32:29,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-25 15:32:29,609 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:32:29,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 229 transitions, 503 flow [2022-11-25 15:32:29,659 INFO L130 PetriNetUnfolder]: 16/292 cut-off events. [2022-11-25 15:32:29,660 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 15:32:29,662 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 898 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. [2022-11-25 15:32:29,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 229 transitions, 503 flow [2022-11-25 15:32:29,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 229 transitions, 503 flow [2022-11-25 15:32:29,665 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:29,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 229 transitions, 503 flow [2022-11-25 15:32:29,665 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 229 transitions, 503 flow [2022-11-25 15:32:29,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 229 transitions, 503 flow [2022-11-25 15:32:29,763 INFO L130 PetriNetUnfolder]: 16/292 cut-off events. [2022-11-25 15:32:29,763 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 15:32:29,766 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 898 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. [2022-11-25 15:32:29,780 INFO L119 LiptonReduction]: Number of co-enabled transitions 36660 [2022-11-25 15:32:35,315 INFO L134 LiptonReduction]: Checked pairs total: 43427 [2022-11-25 15:32:35,315 INFO L136 LiptonReduction]: Total number of compositions: 230 [2022-11-25 15:32:35,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:32:35,322 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=PETRI_NET, 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;@19f04490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:32:35,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 15:32:35,325 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 15:32:35,325 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:35,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:35,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:32:35,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 15:32:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash 57223389, now seen corresponding path program 1 times [2022-11-25 15:32:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149224151] [2022-11-25 15:32:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:35,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:35,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149224151] [2022-11-25 15:32:35,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149224151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:35,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:35,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:32:35,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726771197] [2022-11-25 15:32:35,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:35,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:35,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:35,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 459 [2022-11-25 15:32:35,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:35,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 459 [2022-11-25 15:32:35,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:44,066 INFO L130 PetriNetUnfolder]: 71032/88015 cut-off events. [2022-11-25 15:32:44,066 INFO L131 PetriNetUnfolder]: For 19422/19422 co-relation queries the response was YES. [2022-11-25 15:32:44,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183873 conditions, 88015 events. 71032/88015 cut-off events. For 19422/19422 co-relation queries the response was YES. Maximal size of possible extension queue 3775. Compared 464065 event pairs, 20746 based on Foata normal form. 0/63259 useless extension candidates. Maximal degree in co-relation 24236. Up to 83925 conditions per place. [2022-11-25 15:32:44,625 INFO L137 encePairwiseOnDemand]: 442/459 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2022-11-25 15:32:44,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 331 flow [2022-11-25 15:32:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2022-11-25 15:32:44,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4734931009440813 [2022-11-25 15:32:44,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2022-11-25 15:32:44,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2022-11-25 15:32:44,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:44,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2022-11-25 15:32:44,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:44,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:44,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:44,634 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 137 flow. Second operand 3 states and 652 transitions. [2022-11-25 15:32:44,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 331 flow [2022-11-25 15:32:44,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 299 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-25 15:32:44,651 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 153 flow [2022-11-25 15:32:44,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-11-25 15:32:44,652 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2022-11-25 15:32:44,652 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 153 flow [2022-11-25 15:32:44,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:44,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:44,653 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:44,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 15:32:44,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 15:32:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1729719338, now seen corresponding path program 1 times [2022-11-25 15:32:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:44,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227057987] [2022-11-25 15:32:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:44,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:44,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227057987] [2022-11-25 15:32:44,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227057987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:44,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:44,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:32:44,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197584886] [2022-11-25 15:32:44,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:44,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:44,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:44,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 459 [2022-11-25 15:32:44,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:44,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:44,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 459 [2022-11-25 15:32:44,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:49,258 INFO L130 PetriNetUnfolder]: 33986/43218 cut-off events. [2022-11-25 15:32:49,259 INFO L131 PetriNetUnfolder]: For 10958/10958 co-relation queries the response was YES. [2022-11-25 15:32:49,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96286 conditions, 43218 events. 33986/43218 cut-off events. For 10958/10958 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 214698 event pairs, 24116 based on Foata normal form. 6328/48880 useless extension candidates. Maximal degree in co-relation 34260. Up to 41798 conditions per place. [2022-11-25 15:32:49,658 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-25 15:32:49,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 207 flow [2022-11-25 15:32:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 610 transitions. [2022-11-25 15:32:49,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4429920116194626 [2022-11-25 15:32:49,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 610 transitions. [2022-11-25 15:32:49,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 610 transitions. [2022-11-25 15:32:49,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:49,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 610 transitions. [2022-11-25 15:32:49,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:49,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:49,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:49,666 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 153 flow. Second operand 3 states and 610 transitions. [2022-11-25 15:32:49,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 207 flow [2022-11-25 15:32:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:32:49,672 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 129 flow [2022-11-25 15:32:49,672 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2022-11-25 15:32:49,674 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2022-11-25 15:32:49,674 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 129 flow [2022-11-25 15:32:49,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:49,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:49,675 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:49,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 15:32:49,675 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)] === [2022-11-25 15:32:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 659307859, now seen corresponding path program 1 times [2022-11-25 15:32:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:49,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693898042] [2022-11-25 15:32:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:49,718 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:32:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:32:49,730 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:32:49,734 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:32:49,734 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 15:32:49,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-25 15:32:49,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-25 15:32:49,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-25 15:32:49,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-25 15:32:49,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-25 15:32:49,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-25 15:32:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 15:32:49,736 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 15:32:49,736 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:32:49,736 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-25 15:32:49,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:32:49,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 269 transitions, 598 flow [2022-11-25 15:32:49,840 INFO L130 PetriNetUnfolder]: 19/345 cut-off events. [2022-11-25 15:32:49,840 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 15:32:49,844 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 1149 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. [2022-11-25 15:32:49,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 269 transitions, 598 flow [2022-11-25 15:32:49,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 269 transitions, 598 flow [2022-11-25 15:32:49,847 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:49,847 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 269 transitions, 598 flow [2022-11-25 15:32:49,848 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 269 transitions, 598 flow [2022-11-25 15:32:49,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 269 transitions, 598 flow [2022-11-25 15:32:49,904 INFO L130 PetriNetUnfolder]: 19/345 cut-off events. [2022-11-25 15:32:49,904 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 15:32:49,908 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 1149 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. [2022-11-25 15:32:49,927 INFO L119 LiptonReduction]: Number of co-enabled transitions 53352 [2022-11-25 15:32:56,019 INFO L134 LiptonReduction]: Checked pairs total: 59343 [2022-11-25 15:32:56,019 INFO L136 LiptonReduction]: Total number of compositions: 269 [2022-11-25 15:32:56,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:32:56,021 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=PETRI_NET, 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;@19f04490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:32:56,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 15:32:56,022 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 15:32:56,022 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:32:56,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:56,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:32:56,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-25 15:32:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash 74991254, now seen corresponding path program 1 times [2022-11-25 15:32:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820617787] [2022-11-25 15:32:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:56,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:56,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820617787] [2022-11-25 15:32:56,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820617787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:56,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:56,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:32:56,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231147099] [2022-11-25 15:32:56,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:56,062 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 538 [2022-11-25 15:32:56,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:56,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:56,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 538 [2022-11-25 15:32:56,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand