./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 16:02:37,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:02:37,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:02:37,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:02:37,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:02:37,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:02:37,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:02:37,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:02:37,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:02:37,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:02:37,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:02:37,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:02:37,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:02:37,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:02:37,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:02:37,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:02:37,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:02:37,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:02:37,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:02:37,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:02:37,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:02:37,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:02:37,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:02:37,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:02:37,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:02:37,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:02:37,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:02:37,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:02:37,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:02:37,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:02:37,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:02:37,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:02:37,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:02:37,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:02:37,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:02:37,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:02:37,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:02:37,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:02:37,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:02:37,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:02:37,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:02:37,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:02:37,461 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:02:37,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:02:37,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:02:37,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:02:37,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:02:37,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:02:37,468 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:02:37,469 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:02:37,469 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:02:37,469 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:02:37,470 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:02:37,470 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:02:37,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:02:37,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:02:37,471 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:02:37,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:02:37,472 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:02:37,472 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:02:37,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:02:37,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:02:37,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:02:37,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:02:37,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:02:37,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:02:37,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:02:37,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:02:37,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:02:37,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:02:37,476 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:02:37,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:02:37,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:02:37,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:02:37,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:02:37,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:02:37,477 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:02:37,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:02:37,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:02:37,478 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:02:37,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:02:37,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:02:37,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:02:37,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 [2022-11-23 16:02:37,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:02:37,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:02:37,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:02:37,816 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:02:37,817 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:02:37,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-11-23 16:02:40,948 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:02:41,195 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:02:41,196 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-11-23 16:02:41,209 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/data/1d3f76aaa/b1f9b06f74ab47ee9f0b1e8fa3cac511/FLAG26558e8a8 [2022-11-23 16:02:41,225 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/data/1d3f76aaa/b1f9b06f74ab47ee9f0b1e8fa3cac511 [2022-11-23 16:02:41,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:02:41,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:02:41,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:02:41,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:02:41,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:02:41,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd86653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41, skipping insertion in model container [2022-11-23 16:02:41,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:02:41,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:02:41,704 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_8de96719-809c-4d2d-9586-92317779ba24/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i[31040,31053] [2022-11-23 16:02:41,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:02:41,730 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:02:41,802 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_8de96719-809c-4d2d-9586-92317779ba24/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i[31040,31053] [2022-11-23 16:02:41,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:02:41,864 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:02:41,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41 WrapperNode [2022-11-23 16:02:41,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:02:41,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:02:41,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:02:41,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:02:41,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,945 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 172 [2022-11-23 16:02:41,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:02:41,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:02:41,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:02:41,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:02:41,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,990 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:41,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:02:41,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:02:41,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:02:41,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:02:41,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (1/1) ... [2022-11-23 16:02:42,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:02:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:02:42,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:02:42,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8de96719-809c-4d2d-9586-92317779ba24/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:02:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:02:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-23 16:02:42,079 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-23 16:02:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:02:42,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:02:42,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:02:42,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:02:42,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:02:42,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:02:42,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:02:42,082 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 16:02:42,241 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:02:42,243 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:02:42,629 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:02:42,905 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:02:42,905 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 16:02:42,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:02:42 BoogieIcfgContainer [2022-11-23 16:02:42,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:02:42,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:02:42,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:02:42,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:02:42,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:02:41" (1/3) ... [2022-11-23 16:02:42,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7fc048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:02:42, skipping insertion in model container [2022-11-23 16:02:42,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:41" (2/3) ... [2022-11-23 16:02:42,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7fc048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:02:42, skipping insertion in model container [2022-11-23 16:02:42,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:02:42" (3/3) ... [2022-11-23 16:02:42,924 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-1.i [2022-11-23 16:02:42,934 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 16:02:42,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:02:42,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:02:42,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 16:02:43,043 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 16:02:43,092 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 16:02:43,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 106 transitions, 217 flow [2022-11-23 16:02:43,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 106 transitions, 217 flow [2022-11-23 16:02:43,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-11-23 16:02:43,224 INFO L130 PetriNetUnfolder]: 8/117 cut-off events. [2022-11-23 16:02:43,224 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 16:02:43,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 8/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 113 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-11-23 16:02:43,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904 [2022-11-23 16:02:49,614 INFO L134 LiptonReduction]: Checked pairs total: 1865 [2022-11-23 16:02:49,615 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-11-23 16:02:49,631 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 19 transitions, 43 flow [2022-11-23 16:02:49,656 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 49 states have (on average 2.142857142857143) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:49,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:02:49,690 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@542a1231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:02:49,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 16:02:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 49 states have (on average 2.142857142857143) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 16:02:49,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:49,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 16:02:49,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1063671646, now seen corresponding path program 1 times [2022-11-23 16:02:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:49,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661128517] [2022-11-23 16:02:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:02:49,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 16:02:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:02:49,910 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 16:02:49,912 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 16:02:49,914 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-23 16:02:49,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-23 16:02:49,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-23 16:02:49,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:02:49,921 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-23 16:02:49,925 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 16:02:49,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 16:02:49,988 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 16:02:50,001 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 16:02:50,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 175 transitions, 362 flow [2022-11-23 16:02:50,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 175 transitions, 362 flow [2022-11-23 16:02:50,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-11-23 16:02:50,084 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2022-11-23 16:02:50,085 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 16:02:50,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-11-23 16:02:50,101 INFO L119 LiptonReduction]: Number of co-enabled transitions 13192 [2022-11-23 16:02:58,427 INFO L134 LiptonReduction]: Checked pairs total: 25372 [2022-11-23 16:02:58,427 INFO L136 LiptonReduction]: Total number of compositions: 154 [2022-11-23 16:02:58,428 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 57 transitions, 126 flow [2022-11-23 16:02:58,554 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2621 states, 2613 states have (on average 3.1913509376195943) internal successors, (8339), 2620 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:58,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:02:58,556 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@542a1231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:02:58,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 16:02:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 2621 states, 2613 states have (on average 3.1913509376195943) internal successors, (8339), 2620 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 16:02:58,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:58,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:58,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 16:02:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1578469886, now seen corresponding path program 1 times [2022-11-23 16:02:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:58,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732536000] [2022-11-23 16:02:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:58,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:02:58,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:58,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732536000] [2022-11-23 16:02:58,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732536000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:58,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:58,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:02:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081056007] [2022-11-23 16:02:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:58,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:58,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:58,778 INFO L87 Difference]: Start difference. First operand has 2621 states, 2613 states have (on average 3.1913509376195943) internal successors, (8339), 2620 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:59,024 INFO L93 Difference]: Finished difference Result 2653 states and 8017 transitions. [2022-11-23 16:02:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 16:02:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:59,061 INFO L225 Difference]: With dead ends: 2653 [2022-11-23 16:02:59,061 INFO L226 Difference]: Without dead ends: 2653 [2022-11-23 16:02:59,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:59,065 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:59,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:02:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2022-11-23 16:02:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 2333. [2022-11-23 16:02:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2327 states have (on average 3.042973785990546) internal successors, (7081), 2332 states have internal predecessors, (7081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 7081 transitions. [2022-11-23 16:02:59,221 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 7081 transitions. Word has length 10 [2022-11-23 16:02:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:59,222 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 7081 transitions. [2022-11-23 16:02:59,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 7081 transitions. [2022-11-23 16:02:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:02:59,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:59,226 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 16:02:59,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:02:59,227 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)] === [2022-11-23 16:02:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 568092513, now seen corresponding path program 1 times [2022-11-23 16:02:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814363694] [2022-11-23 16:02:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:02:59,275 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 16:02:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:02:59,293 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 16:02:59,294 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 16:02:59,294 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 16:02:59,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 16:02:59,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-23 16:02:59,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 16:02:59,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:02:59,296 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 16:02:59,296 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 16:02:59,296 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 16:02:59,351 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 16:02:59,354 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 16:02:59,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 244 transitions, 509 flow [2022-11-23 16:02:59,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 244 transitions, 509 flow [2022-11-23 16:02:59,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-11-23 16:02:59,417 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2022-11-23 16:02:59,417 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 16:02:59,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 22/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 737 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-11-23 16:02:59,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 33864 [2022-11-23 16:03:10,246 INFO L134 LiptonReduction]: Checked pairs total: 64851 [2022-11-23 16:03:10,246 INFO L136 LiptonReduction]: Total number of compositions: 210 [2022-11-23 16:03:10,247 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 75 places, 83 transitions, 187 flow [2022-11-23 16:03:12,734 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55230 states, 55211 states have (on average 4.370089293800149) internal successors, (241277), 55229 states have internal predecessors, (241277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:12,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:03:12,739 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@542a1231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:03:12,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 16:03:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 55230 states, 55211 states have (on average 4.370089293800149) internal successors, (241277), 55229 states have internal predecessors, (241277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:03:12,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:12,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:12,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 16:03:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1461503341, now seen corresponding path program 1 times [2022-11-23 16:03:12,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:12,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950617746] [2022-11-23 16:03:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:03:13,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:13,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950617746] [2022-11-23 16:03:13,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950617746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:13,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:13,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:03:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700352774] [2022-11-23 16:03:13,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:13,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:03:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:03:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:03:13,245 INFO L87 Difference]: Start difference. First operand has 55230 states, 55211 states have (on average 4.370089293800149) internal successors, (241277), 55229 states have internal predecessors, (241277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:15,118 INFO L93 Difference]: Finished difference Result 62603 states and 257290 transitions. [2022-11-23 16:03:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:03:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 16:03:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:16,027 INFO L225 Difference]: With dead ends: 62603 [2022-11-23 16:03:16,028 INFO L226 Difference]: Without dead ends: 62603 [2022-11-23 16:03:16,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:03:16,035 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 197 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:16,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 100 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:03:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62603 states. [2022-11-23 16:03:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62603 to 52093. [2022-11-23 16:03:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52093 states, 52079 states have (on average 4.129918009178364) internal successors, (215082), 52092 states have internal predecessors, (215082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52093 states to 52093 states and 215082 transitions. [2022-11-23 16:03:19,664 INFO L78 Accepts]: Start accepts. Automaton has 52093 states and 215082 transitions. Word has length 11 [2022-11-23 16:03:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:19,664 INFO L495 AbstractCegarLoop]: Abstraction has 52093 states and 215082 transitions. [2022-11-23 16:03:19,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 52093 states and 215082 transitions. [2022-11-23 16:03:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 16:03:19,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:19,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:19,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:03:19,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 16:03:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash 492550951, now seen corresponding path program 1 times [2022-11-23 16:03:19,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:19,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027124140] [2022-11-23 16:03:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:19,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:03:19,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027124140] [2022-11-23 16:03:19,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027124140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:19,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:19,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:03:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369627905] [2022-11-23 16:03:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:19,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:03:19,849 INFO L87 Difference]: Start difference. First operand 52093 states and 215082 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:21,063 INFO L93 Difference]: Finished difference Result 59453 states and 243606 transitions. [2022-11-23 16:03:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 16:03:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:21,440 INFO L225 Difference]: With dead ends: 59453 [2022-11-23 16:03:21,446 INFO L226 Difference]: Without dead ends: 59453 [2022-11-23 16:03:21,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:03:21,449 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:21,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59453 states. [2022-11-23 16:03:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59453 to 59263. [2022-11-23 16:03:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59263 states, 59238 states have (on average 4.103683446436409) internal successors, (243094), 59262 states have internal predecessors, (243094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59263 states to 59263 states and 243094 transitions. [2022-11-23 16:03:24,169 INFO L78 Accepts]: Start accepts. Automaton has 59263 states and 243094 transitions. Word has length 12 [2022-11-23 16:03:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:24,169 INFO L495 AbstractCegarLoop]: Abstraction has 59263 states and 243094 transitions. [2022-11-23 16:03:24,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 59263 states and 243094 transitions. [2022-11-23 16:03:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 16:03:24,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:24,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:24,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:03:24,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 16:03:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash 603216428, now seen corresponding path program 1 times [2022-11-23 16:03:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:24,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061590138] [2022-11-23 16:03:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:24,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:03:24,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:24,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061590138] [2022-11-23 16:03:24,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061590138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:24,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:24,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:03:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140784254] [2022-11-23 16:03:24,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:03:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:03:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:03:24,851 INFO L87 Difference]: Start difference. First operand 59263 states and 243094 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:25,861 INFO L93 Difference]: Finished difference Result 83485 states and 343112 transitions. [2022-11-23 16:03:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:03:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 16:03:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:26,987 INFO L225 Difference]: With dead ends: 83485 [2022-11-23 16:03:26,987 INFO L226 Difference]: Without dead ends: 83485 [2022-11-23 16:03:26,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:03:26,988 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 180 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:26,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 149 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:03:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83485 states. [2022-11-23 16:03:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83485 to 65617. [2022-11-23 16:03:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65617 states, 65592 states have (on average 4.098030247591169) internal successors, (268798), 65616 states have internal predecessors, (268798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65617 states to 65617 states and 268798 transitions. [2022-11-23 16:03:30,198 INFO L78 Accepts]: Start accepts. Automaton has 65617 states and 268798 transitions. Word has length 14 [2022-11-23 16:03:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:30,198 INFO L495 AbstractCegarLoop]: Abstraction has 65617 states and 268798 transitions. [2022-11-23 16:03:30,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 65617 states and 268798 transitions. [2022-11-23 16:03:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 16:03:30,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:30,201 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 16:03:30,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:03:30,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 16:03:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1558732418, now seen corresponding path program 1 times [2022-11-23 16:03:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:30,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143767110] [2022-11-23 16:03:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:03:30,221 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 16:03:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:03:30,236 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 16:03:30,236 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 16:03:30,236 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-23 16:03:30,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-23 16:03:30,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-23 16:03:30,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-23 16:03:30,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-23 16:03:30,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:03:30,238 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 16:03:30,238 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 16:03:30,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-23 16:03:30,302 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 16:03:30,305 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 16:03:30,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 313 transitions, 658 flow [2022-11-23 16:03:30,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 313 transitions, 658 flow [2022-11-23 16:03:30,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-11-23 16:03:30,409 INFO L130 PetriNetUnfolder]: 29/363 cut-off events. [2022-11-23 16:03:30,410 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 16:03:30,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 363 events. 29/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1160 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-11-23 16:03:30,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 63920 [2022-11-23 16:03:44,791 INFO L134 LiptonReduction]: Checked pairs total: 127298 [2022-11-23 16:03:44,791 INFO L136 LiptonReduction]: Total number of compositions: 267 [2022-11-23 16:03:44,792 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 98 places, 109 transitions, 250 flow