./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta --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 10dd65d363f3d099295f575f6743961c3e6b480300728ce34fc95b90972dc72c --- 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-dbf71c6-m [2022-10-17 17:15:03,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:15:03,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:15:03,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:15:03,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:15:03,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:15:03,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:15:03,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:15:03,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:15:03,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:15:03,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:15:03,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:15:03,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:15:03,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:15:03,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:15:03,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:15:03,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:15:03,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:15:03,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:15:03,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:15:03,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:15:03,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:15:03,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:15:03,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:15:03,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:15:03,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:15:03,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:15:03,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:15:03,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:15:03,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:15:03,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:15:03,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:15:03,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:15:03,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:15:03,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:15:03,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:15:03,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:15:03,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:15:03,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:15:03,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:15:03,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:15:03,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:15:03,423 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:15:03,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:15:03,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:15:03,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:15:03,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:15:03,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:15:03,426 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:15:03,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:15:03,426 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:15:03,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:15:03,429 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:15:03,429 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:15:03,429 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:15:03,429 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:15:03,430 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:15:03,430 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:15:03,430 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:15:03,430 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:15:03,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:15:03,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:15:03,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:15:03,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:15:03,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:15:03,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:15:03,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:15:03,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:15:03,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:15:03,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:15:03,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:15:03,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:15:03,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:15:03,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:15:03,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:15:03,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:15:03,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:15:03,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:15:03,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:15:03,436 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:15:03,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:15:03,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:15:03,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:15:03,437 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_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10dd65d363f3d099295f575f6743961c3e6b480300728ce34fc95b90972dc72c [2022-10-17 17:15:03,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:15:03,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:15:03,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:15:03,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:15:03,820 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:15:03,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2022-10-17 17:15:03,906 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/data/953efdb47/b2b86d5fa2e04433a93ecfd3e73ba42e/FLAG966347cdd [2022-10-17 17:15:04,569 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:15:04,570 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/sv-benchmarks/c/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2022-10-17 17:15:04,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/data/953efdb47/b2b86d5fa2e04433a93ecfd3e73ba42e/FLAG966347cdd [2022-10-17 17:15:04,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/data/953efdb47/b2b86d5fa2e04433a93ecfd3e73ba42e [2022-10-17 17:15:04,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:15:04,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:15:04,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:15:04,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:15:04,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:15:04,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:15:04" (1/1) ... [2022-10-17 17:15:04,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4ca773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:04, skipping insertion in model container [2022-10-17 17:15:04,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:15:04" (1/1) ... [2022-10-17 17:15:04,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:15:04,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:15:05,073 WARN L230 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_895a6227-efe9-4652-92bf-d11ce82e6085/sv-benchmarks/c/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2022-10-17 17:15:05,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:15:05,337 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:15:05,357 WARN L230 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_895a6227-efe9-4652-92bf-d11ce82e6085/sv-benchmarks/c/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2022-10-17 17:15:05,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:15:05,439 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:15:05,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05 WrapperNode [2022-10-17 17:15:05,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:15:05,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:15:05,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:15:05,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:15:05,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,496 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-10-17 17:15:05,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:15:05,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:15:05,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:15:05,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:15:05,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,526 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:15:05,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:15:05,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:15:05,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:15:05,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (1/1) ... [2022-10-17 17:15:05,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:15:05,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:15:05,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:15:05,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:15:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:15:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 17:15:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:15:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:15:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:15:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-10-17 17:15:05,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-10-17 17:15:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-10-17 17:15:05,640 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-10-17 17:15:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-10-17 17:15:05,640 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-10-17 17:15:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:15:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 17:15:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:15:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:15:05,643 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 17:15:05,806 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:15:05,809 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:15:06,075 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:15:06,088 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:15:06,090 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:15:06,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:15:06 BoogieIcfgContainer [2022-10-17 17:15:06,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:15:06,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:15:06,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:15:06,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:15:06,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:15:04" (1/3) ... [2022-10-17 17:15:06,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6658dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:15:06, skipping insertion in model container [2022-10-17 17:15:06,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:05" (2/3) ... [2022-10-17 17:15:06,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6658dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:15:06, skipping insertion in model container [2022-10-17 17:15:06,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:15:06" (3/3) ... [2022-10-17 17:15:06,121 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2022-10-17 17:15:06,134 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 17:15:06,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:15:06,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:15:06,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 17:15:06,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:15:06,309 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:15:06,325 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 91 transitions, 197 flow [2022-10-17 17:15:06,328 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 91 transitions, 197 flow [2022-10-17 17:15:06,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 91 transitions, 197 flow [2022-10-17 17:15:06,391 INFO L130 PetriNetUnfolder]: 2/88 cut-off events. [2022-10-17 17:15:06,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 17:15:06,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 88 events. 2/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2022-10-17 17:15:06,400 INFO L118 LiptonReduction]: Number of co-enabled transitions 1518 [2022-10-17 17:15:09,533 INFO L133 LiptonReduction]: Checked pairs total: 2438 [2022-10-17 17:15:09,533 INFO L135 LiptonReduction]: Total number of compositions: 82 [2022-10-17 17:15:09,553 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 20 transitions, 55 flow [2022-10-17 17:15:09,609 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 178 states, 177 states have (on average 2.7231638418079096) internal successors, (482), 177 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) [2022-10-17 17:15:09,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:15:09,639 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;@5d54b77d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:15:09,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 17:15:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 177 states have (on average 2.7231638418079096) internal successors, (482), 177 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) [2022-10-17 17:15:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:15:09,651 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:09,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:09,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash -339108341, now seen corresponding path program 1 times [2022-10-17 17:15:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:09,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401060678] [2022-10-17 17:15:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:10,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:10,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401060678] [2022-10-17 17:15:10,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401060678] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:10,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:10,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-17 17:15:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293272057] [2022-10-17 17:15:10,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:10,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:15:10,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:10,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:15:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:15:10,361 INFO L87 Difference]: Start difference. First operand has 178 states, 177 states have (on average 2.7231638418079096) internal successors, (482), 177 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) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:10,452 INFO L93 Difference]: Finished difference Result 166 states and 441 transitions. [2022-10-17 17:15:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:15:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:15:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:10,476 INFO L225 Difference]: With dead ends: 166 [2022-10-17 17:15:10,477 INFO L226 Difference]: Without dead ends: 166 [2022-10-17 17:15:10,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:15:10,485 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:10,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:15:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-10-17 17:15:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-10-17 17:15:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.672727272727273) internal successors, (441), 165 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 441 transitions. [2022-10-17 17:15:10,578 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 441 transitions. Word has length 8 [2022-10-17 17:15:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:10,579 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 441 transitions. [2022-10-17 17:15:10,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 441 transitions. [2022-10-17 17:15:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:15:10,581 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:10,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:10,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:15:10,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1922466999, now seen corresponding path program 1 times [2022-10-17 17:15:10,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720603533] [2022-10-17 17:15:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:10,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:10,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:10,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720603533] [2022-10-17 17:15:10,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720603533] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:10,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:10,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:15:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488222920] [2022-10-17 17:15:10,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:10,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:15:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:15:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:15:10,848 INFO L87 Difference]: Start difference. First operand 166 states and 441 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:10,929 INFO L93 Difference]: Finished difference Result 202 states and 516 transitions. [2022-10-17 17:15:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:15:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:15:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:10,934 INFO L225 Difference]: With dead ends: 202 [2022-10-17 17:15:10,934 INFO L226 Difference]: Without dead ends: 130 [2022-10-17 17:15:10,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:15:10,938 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:10,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:15:10,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-10-17 17:15:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-10-17 17:15:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.496124031007752) internal successors, (322), 129 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 322 transitions. [2022-10-17 17:15:10,974 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 322 transitions. Word has length 9 [2022-10-17 17:15:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:10,975 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 322 transitions. [2022-10-17 17:15:10,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 322 transitions. [2022-10-17 17:15:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:15:10,978 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:10,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:10,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:15:10,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash 533171110, now seen corresponding path program 1 times [2022-10-17 17:15:10,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:10,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753942374] [2022-10-17 17:15:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:10,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:11,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:11,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753942374] [2022-10-17 17:15:11,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753942374] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:11,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:11,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:15:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668571135] [2022-10-17 17:15:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:15:11,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:15:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:15:11,154 INFO L87 Difference]: Start difference. First operand 130 states and 322 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:11,250 INFO L93 Difference]: Finished difference Result 148 states and 336 transitions. [2022-10-17 17:15:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:15:11,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:15:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:11,253 INFO L225 Difference]: With dead ends: 148 [2022-10-17 17:15:11,253 INFO L226 Difference]: Without dead ends: 112 [2022-10-17 17:15:11,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:15:11,259 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:11,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:15:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-10-17 17:15:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-10-17 17:15:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.279279279279279) internal successors, (253), 111 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 253 transitions. [2022-10-17 17:15:11,277 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 253 transitions. Word has length 10 [2022-10-17 17:15:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:11,277 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 253 transitions. [2022-10-17 17:15:11,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 253 transitions. [2022-10-17 17:15:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:15:11,280 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:11,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:11,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:15:11,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash -651601067, now seen corresponding path program 1 times [2022-10-17 17:15:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:11,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419760426] [2022-10-17 17:15:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:11,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:11,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419760426] [2022-10-17 17:15:11,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419760426] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:11,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:11,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:15:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147812357] [2022-10-17 17:15:11,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:15:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:15:11,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:15:11,495 INFO L87 Difference]: Start difference. First operand 112 states and 253 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:11,608 INFO L93 Difference]: Finished difference Result 109 states and 227 transitions. [2022-10-17 17:15:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:15:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 17:15:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:11,611 INFO L225 Difference]: With dead ends: 109 [2022-10-17 17:15:11,611 INFO L226 Difference]: Without dead ends: 85 [2022-10-17 17:15:11,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:15:11,615 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:11,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 14 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:15:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-17 17:15:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-10-17 17:15:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2022-10-17 17:15:11,624 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 11 [2022-10-17 17:15:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:11,624 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2022-10-17 17:15:11,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2022-10-17 17:15:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:15:11,631 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:11,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:15:11,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash 874078638, now seen corresponding path program 1 times [2022-10-17 17:15:11,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:11,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575003132] [2022-10-17 17:15:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:11,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:11,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:11,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575003132] [2022-10-17 17:15:11,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575003132] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:11,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:11,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:15:11,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569839274] [2022-10-17 17:15:11,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:11,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:15:11,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:11,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:15:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:15:11,892 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:11,991 INFO L93 Difference]: Finished difference Result 80 states and 161 transitions. [2022-10-17 17:15:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:15:11,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 17:15:11,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:11,993 INFO L225 Difference]: With dead ends: 80 [2022-10-17 17:15:11,993 INFO L226 Difference]: Without dead ends: 72 [2022-10-17 17:15:11,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:15:11,994 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:11,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:15:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-17 17:15:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-10-17 17:15:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 147 transitions. [2022-10-17 17:15:12,001 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 147 transitions. Word has length 13 [2022-10-17 17:15:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:12,002 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 147 transitions. [2022-10-17 17:15:12,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 147 transitions. [2022-10-17 17:15:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:15:12,004 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:12,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:12,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:15:12,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash -273208078, now seen corresponding path program 1 times [2022-10-17 17:15:12,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:12,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181999484] [2022-10-17 17:15:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:12,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:12,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181999484] [2022-10-17 17:15:12,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181999484] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:12,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:12,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:15:12,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570904874] [2022-10-17 17:15:12,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:12,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:15:12,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:12,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:15:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:15:12,237 INFO L87 Difference]: Start difference. First operand 72 states and 147 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:12,303 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2022-10-17 17:15:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:15:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-10-17 17:15:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:12,305 INFO L225 Difference]: With dead ends: 85 [2022-10-17 17:15:12,305 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 17:15:12,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:15:12,306 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:12,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:15:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 17:15:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-10-17 17:15:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 45 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 83 transitions. [2022-10-17 17:15:12,310 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 83 transitions. Word has length 16 [2022-10-17 17:15:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:12,311 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 83 transitions. [2022-10-17 17:15:12,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 83 transitions. [2022-10-17 17:15:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:15:12,312 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:12,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:12,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:15:12,313 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1409622578, now seen corresponding path program 2 times [2022-10-17 17:15:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:12,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593814473] [2022-10-17 17:15:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:12,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:12,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593814473] [2022-10-17 17:15:12,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593814473] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:12,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:12,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:15:12,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400382422] [2022-10-17 17:15:12,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:12,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:15:12,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:15:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:15:12,488 INFO L87 Difference]: Start difference. First operand 46 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:12,552 INFO L93 Difference]: Finished difference Result 59 states and 104 transitions. [2022-10-17 17:15:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:15:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-10-17 17:15:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:12,554 INFO L225 Difference]: With dead ends: 59 [2022-10-17 17:15:12,554 INFO L226 Difference]: Without dead ends: 33 [2022-10-17 17:15:12,555 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 [2022-10-17 17:15:12,556 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:12,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:15:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-17 17:15:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-17 17:15:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2022-10-17 17:15:12,560 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 16 [2022-10-17 17:15:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:12,561 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2022-10-17 17:15:12,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2022-10-17 17:15:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:15:12,562 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:12,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:12,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:15:12,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:15:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:12,563 INFO L85 PathProgramCache]: Analyzing trace with hash -774511876, now seen corresponding path program 3 times [2022-10-17 17:15:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:12,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484822769] [2022-10-17 17:15:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:12,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484822769] [2022-10-17 17:15:12,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484822769] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:12,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:12,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:15:12,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283256092] [2022-10-17 17:15:12,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:12,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:15:12,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:15:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:15:12,753 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:12,820 INFO L93 Difference]: Finished difference Result 32 states and 50 transitions. [2022-10-17 17:15:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:15:12,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-10-17 17:15:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:12,821 INFO L225 Difference]: With dead ends: 32 [2022-10-17 17:15:12,821 INFO L226 Difference]: Without dead ends: 0 [2022-10-17 17:15:12,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:15:12,822 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:12,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:15:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-17 17:15:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-17 17:15:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-17 17:15:12,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2022-10-17 17:15:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:12,824 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-17 17:15:12,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-17 17:15:12,824 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-17 17:15:12,827 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-10-17 17:15:12,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-10-17 17:15:12,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-10-17 17:15:12,829 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-10-17 17:15:12,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:15:12,831 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-10-17 17:15:12,835 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-10-17 17:15:12,835 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:15:12,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:15:12 BasicIcfg [2022-10-17 17:15:12,838 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:15:12,839 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:15:12,839 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:15:12,839 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:15:12,840 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:15:06" (3/4) ... [2022-10-17 17:15:12,844 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-10-17 17:15:12,852 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2022-10-17 17:15:12,852 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2022-10-17 17:15:12,852 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2022-10-17 17:15:12,858 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-10-17 17:15:12,858 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-10-17 17:15:12,858 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-10-17 17:15:12,859 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-10-17 17:15:12,896 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/witness.graphml [2022-10-17 17:15:12,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:15:12,897 INFO L158 Benchmark]: Toolchain (without parser) took 8112.47ms. Allocated memory was 96.5MB in the beginning and 142.6MB in the end (delta: 46.1MB). Free memory was 59.7MB in the beginning and 109.4MB in the end (delta: -49.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:15:12,897 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 28.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:15:12,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 653.42ms. Allocated memory is still 96.5MB. Free memory was 59.5MB in the beginning and 60.6MB in the end (delta: -1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 17:15:12,898 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.08ms. Allocated memory is still 96.5MB. Free memory was 60.3MB in the beginning and 58.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:15:12,899 INFO L158 Benchmark]: Boogie Preprocessor took 34.86ms. Allocated memory is still 96.5MB. Free memory was 58.4MB in the beginning and 57.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:15:12,899 INFO L158 Benchmark]: RCFGBuilder took 561.80ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 56.8MB in the beginning and 93.1MB in the end (delta: -36.4MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2022-10-17 17:15:12,900 INFO L158 Benchmark]: TraceAbstraction took 6724.51ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 92.2MB in the beginning and 112.6MB in the end (delta: -20.3MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2022-10-17 17:15:12,900 INFO L158 Benchmark]: Witness Printer took 57.49ms. Allocated memory is still 142.6MB. Free memory was 112.6MB in the beginning and 109.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-10-17 17:15:12,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 28.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 653.42ms. Allocated memory is still 96.5MB. Free memory was 59.5MB in the beginning and 60.6MB in the end (delta: -1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.08ms. Allocated memory is still 96.5MB. Free memory was 60.3MB in the beginning and 58.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.86ms. Allocated memory is still 96.5MB. Free memory was 58.4MB in the beginning and 57.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 561.80ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 56.8MB in the beginning and 93.1MB in the end (delta: -36.4MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6724.51ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 92.2MB in the beginning and 112.6MB in the end (delta: -20.3MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * Witness Printer took 57.49ms. Allocated memory is still 142.6MB. Free memory was 112.6MB in the beginning and 109.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 99 PlacesBefore, 30 PlacesAfterwards, 91 TransitionsBefore, 20 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 5 FixpointIterations, 23 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 82 TotalNumberOfCompositions, 2438 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1813, positive: 1740, positive conditional: 0, positive unconditional: 1740, negative: 73, negative conditional: 0, negative unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1192, positive: 1149, positive conditional: 0, positive unconditional: 1149, negative: 43, negative conditional: 0, negative unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1192, positive: 1142, positive conditional: 0, positive unconditional: 1142, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 50, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 43, negative conditional: 0, negative unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 168, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 141, negative conditional: 0, negative unconditional: 141, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1813, positive: 591, positive conditional: 0, positive unconditional: 591, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 1192, unknown conditional: 0, unknown unconditional: 1192] , Statistics on independence cache: Total cache size (in pairs): 74, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 113 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 6.5s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 154 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 154 mSDsluCounter, 52 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 181 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 378 IncrementalHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 20 mSDtfsCounter, 378 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=0, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 321 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-10-17 17:15:12,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895a6227-efe9-4652-92bf-d11ce82e6085/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE