./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f02fd31f03f03300713de36d3982e392122375115e7a5509580eaaa38dd9026f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:06:46,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:06:46,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:06:46,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:06:46,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:06:46,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:06:46,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:06:46,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:06:46,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:06:46,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:06:46,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:06:46,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:06:46,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:06:46,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:06:46,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:06:46,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:06:46,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:06:46,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:06:46,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:06:46,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:06:46,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:06:46,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:06:46,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:06:46,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:06:46,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:06:46,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:06:46,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:06:46,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:06:46,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:06:46,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:06:46,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:06:46,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:06:46,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:06:46,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:06:46,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:06:46,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:06:46,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:06:46,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:06:46,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:06:46,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:06:46,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:06:46,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:06:46,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:06:46,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:06:46,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:06:46,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:06:46,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:06:46,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:06:46,347 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:06:46,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:06:46,348 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:06:46,348 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:06:46,349 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:06:46,350 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:06:46,350 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:06:46,350 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:06:46,350 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:06:46,351 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:06:46,351 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:06:46,351 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:06:46,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:06:46,353 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:06:46,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:06:46,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:06:46,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:06:46,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:06:46,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:06:46,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:06:46,355 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:06:46,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:06:46,356 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:06:46,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:06:46,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:06:46,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:06:46,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:06:46,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:06:46,358 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:06:46,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:06:46,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:06:46,359 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:06:46,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:06:46,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:06:46,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:06:46,359 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_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f02fd31f03f03300713de36d3982e392122375115e7a5509580eaaa38dd9026f [2022-11-23 14:06:46,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:06:46,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:06:46,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:06:46,740 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:06:46,740 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:06:46,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c [2022-11-23 14:06:50,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:06:50,452 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:06:50,453 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c [2022-11-23 14:06:50,464 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/data/cd487de3f/4c82eb0631eb41a08b6eabc332122a4f/FLAGed19b76d0 [2022-11-23 14:06:50,510 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/data/cd487de3f/4c82eb0631eb41a08b6eabc332122a4f [2022-11-23 14:06:50,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:06:50,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:06:50,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:06:50,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:06:50,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:06:50,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d3642d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50, skipping insertion in model container [2022-11-23 14:06:50,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:06:50,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:06:50,801 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c[5274,5287] [2022-11-23 14:06:50,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:06:50,823 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:06:50,864 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/sv-benchmarks/c/weaver/parallel-ticket-8.wvr.c[5274,5287] [2022-11-23 14:06:50,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:06:50,884 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:06:50,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50 WrapperNode [2022-11-23 14:06:50,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:06:50,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:06:50,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:06:50,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:06:50,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,950 INFO L138 Inliner]: procedures = 27, calls = 130, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 358 [2022-11-23 14:06:50,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:06:50,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:06:50,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:06:50,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:06:50,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,985 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:50,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:06:50,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:06:50,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:06:50,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:06:50,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (1/1) ... [2022-11-23 14:06:51,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:06:51,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:51,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:06:51,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_657e8615-e957-44c6-961e-83e0afd2dc43/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:06:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:06:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:06:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:06:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:06:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 14:06:51,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 14:06:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 14:06:51,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 14:06:51,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 14:06:51,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 14:06:51,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 14:06:51,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 14:06:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:06:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-23 14:06:51,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-23 14:06:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-23 14:06:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-23 14:06:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2022-11-23 14:06:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2022-11-23 14:06:51,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2022-11-23 14:06:51,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2022-11-23 14:06:51,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 14:06:51,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 14:06:51,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:06:51,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:06:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:06:51,131 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 14:06:51,360 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:06:51,362 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:06:52,045 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:06:52,170 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:06:52,171 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:06:52,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:52 BoogieIcfgContainer [2022-11-23 14:06:52,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:06:52,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:06:52,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:06:52,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:06:52,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:50" (1/3) ... [2022-11-23 14:06:52,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe25ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:52, skipping insertion in model container [2022-11-23 14:06:52,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:50" (2/3) ... [2022-11-23 14:06:52,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe25ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:52, skipping insertion in model container [2022-11-23 14:06:52,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:52" (3/3) ... [2022-11-23 14:06:52,186 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-8.wvr.c [2022-11-23 14:06:52,197 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 14:06:52,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:06:52,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:06:52,211 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:06:52,424 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-23 14:06:52,472 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:06:52,491 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 234 transitions, 532 flow [2022-11-23 14:06:52,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 234 transitions, 532 flow [2022-11-23 14:06:52,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 234 transitions, 532 flow [2022-11-23 14:06:52,731 INFO L130 PetriNetUnfolder]: 2/226 cut-off events. [2022-11-23 14:06:52,732 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 14:06:52,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 226 events. 2/226 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 105 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 177. Up to 2 conditions per place. [2022-11-23 14:06:52,746 INFO L119 LiptonReduction]: Number of co-enabled transitions 5502 [2022-11-23 14:07:16,743 INFO L134 LiptonReduction]: Checked pairs total: 13905 [2022-11-23 14:07:16,744 INFO L136 LiptonReduction]: Total number of compositions: 182 [2022-11-23 14:07:16,754 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 84 places, 59 transitions, 182 flow [2022-11-23 14:07:19,500 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32802 states, 32801 states have (on average 5.667327215633669) internal successors, (185894), 32801 states have internal predecessors, (185894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:19,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:07:19,544 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e5b2497, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:07:19,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-23 14:07:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 32802 states, 32801 states have (on average 5.667327215633669) internal successors, (185894), 32801 states have internal predecessors, (185894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:07:20,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:20,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:20,296 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 6 more)] === [2022-11-23 14:07:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash -635513452, now seen corresponding path program 1 times [2022-11-23 14:07:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051431475] [2022-11-23 14:07:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:20,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:22,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:22,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051431475] [2022-11-23 14:07:22,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051431475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:22,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:22,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:07:22,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756978341] [2022-11-23 14:07:22,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:22,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:07:22,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:07:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:22,469 INFO L87 Difference]: Start difference. First operand has 32802 states, 32801 states have (on average 5.667327215633669) internal successors, (185894), 32801 states have internal predecessors, (185894), 0 states have call successors, (0), 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 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:25,986 INFO L93 Difference]: Finished difference Result 99168 states and 546237 transitions. [2022-11-23 14:07:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:07:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-23 14:07:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:27,511 INFO L225 Difference]: With dead ends: 99168 [2022-11-23 14:07:27,511 INFO L226 Difference]: Without dead ends: 99168 [2022-11-23 14:07:27,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:07:27,516 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 147 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:27,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 0 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:07:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99168 states. [2022-11-23 14:07:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99168 to 59108. [2022-11-23 14:07:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59108 states, 59107 states have (on average 5.616932004669498) internal successors, (332000), 59107 states have internal predecessors, (332000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59108 states to 59108 states and 332000 transitions. [2022-11-23 14:07:33,794 INFO L78 Accepts]: Start accepts. Automaton has 59108 states and 332000 transitions. Word has length 50 [2022-11-23 14:07:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:33,795 INFO L495 AbstractCegarLoop]: Abstraction has 59108 states and 332000 transitions. [2022-11-23 14:07:33,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 59108 states and 332000 transitions. [2022-11-23 14:07:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:07:35,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:35,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:07:35,208 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 6 more)] === [2022-11-23 14:07:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:35,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2141708642, now seen corresponding path program 2 times [2022-11-23 14:07:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:35,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399788741] [2022-11-23 14:07:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:35,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:36,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:36,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399788741] [2022-11-23 14:07:36,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399788741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:36,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:36,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:07:36,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556906428] [2022-11-23 14:07:36,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:36,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:07:36,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:07:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:07:36,359 INFO L87 Difference]: Start difference. First operand 59108 states and 332000 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:39,935 INFO L93 Difference]: Finished difference Result 136130 states and 740095 transitions. [2022-11-23 14:07:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:07:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-23 14:07:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:41,333 INFO L225 Difference]: With dead ends: 136130 [2022-11-23 14:07:41,333 INFO L226 Difference]: Without dead ends: 136130 [2022-11-23 14:07:41,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:07:41,335 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 157 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:41,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 0 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:07:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136130 states. [2022-11-23 14:07:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136130 to 86884. [2022-11-23 14:07:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86884 states, 86883 states have (on average 5.562676242763256) internal successors, (483302), 86883 states have internal predecessors, (483302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86884 states to 86884 states and 483302 transitions. [2022-11-23 14:07:48,572 INFO L78 Accepts]: Start accepts. Automaton has 86884 states and 483302 transitions. Word has length 50 [2022-11-23 14:07:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:48,574 INFO L495 AbstractCegarLoop]: Abstraction has 86884 states and 483302 transitions. [2022-11-23 14:07:48,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 86884 states and 483302 transitions. [2022-11-23 14:07:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:07:48,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:48,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:07:48,914 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 6 more)] === [2022-11-23 14:07:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1643114078, now seen corresponding path program 3 times [2022-11-23 14:07:48,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:48,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331703933] [2022-11-23 14:07:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:50,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331703933] [2022-11-23 14:07:50,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331703933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:50,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:50,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 14:07:50,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112639566] [2022-11-23 14:07:50,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:50,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:07:50,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:07:50,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:07:50,496 INFO L87 Difference]: Start difference. First operand 86884 states and 483302 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:54,179 INFO L93 Difference]: Finished difference Result 152352 states and 806017 transitions. [2022-11-23 14:07:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:07:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-23 14:07:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:56,232 INFO L225 Difference]: With dead ends: 152352 [2022-11-23 14:07:56,233 INFO L226 Difference]: Without dead ends: 152352 [2022-11-23 14:07:56,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:07:56,255 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 258 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:56,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 0 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:07:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152352 states. [2022-11-23 14:08:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152352 to 116582. [2022-11-23 14:08:02,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116582 states, 116581 states have (on average 5.395313129926832) internal successors, (628991), 116581 states have internal predecessors, (628991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116582 states to 116582 states and 628991 transitions. [2022-11-23 14:08:04,213 INFO L78 Accepts]: Start accepts. Automaton has 116582 states and 628991 transitions. Word has length 50 [2022-11-23 14:08:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:04,214 INFO L495 AbstractCegarLoop]: Abstraction has 116582 states and 628991 transitions. [2022-11-23 14:08:04,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 116582 states and 628991 transitions. [2022-11-23 14:08:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:08:04,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:04,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:04,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:08:04,779 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 6 more)] === [2022-11-23 14:08:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1223138688, now seen corresponding path program 4 times [2022-11-23 14:08:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859528148] [2022-11-23 14:08:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:05,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859528148] [2022-11-23 14:08:05,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859528148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:05,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:05,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:08:05,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108852369] [2022-11-23 14:08:05,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:05,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:08:05,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:08:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:08:05,573 INFO L87 Difference]: Start difference. First operand 116582 states and 628991 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:10,507 INFO L93 Difference]: Finished difference Result 190624 states and 991693 transitions. [2022-11-23 14:08:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:08:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-23 14:08:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted.