./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw --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 6d67b26c9d6dbfd265b32dfe97063f0b6065a61c5709b8120357b3eaad40bf46 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:27:53,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:27:53,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:27:53,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:27:53,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:27:53,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:27:53,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:27:53,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:27:53,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:27:53,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:27:53,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:27:53,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:27:53,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:27:53,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:27:53,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:27:53,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:27:53,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:27:53,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:27:53,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:27:53,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:27:53,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:27:53,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:27:53,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:27:53,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:27:53,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:27:53,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:27:53,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:27:53,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:27:53,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:27:53,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:27:53,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:27:53,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:27:53,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:27:53,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:27:53,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:27:53,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:27:53,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:27:53,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:27:53,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:27:53,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:27:53,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:27:53,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:27:53,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:27:53,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:27:53,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:27:53,350 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:27:53,350 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:27:53,351 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:27:53,351 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:27:53,351 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:27:53,359 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:27:53,359 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:27:53,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:27:53,361 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:27:53,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:27:53,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:27:53,362 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:27:53,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:27:53,363 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:27:53,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:27:53,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:27:53,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:27:53,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:27:53,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:27:53,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:27:53,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:27:53,366 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:27:53,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:27:53,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:27:53,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:27:53,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:27:53,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:27:53,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:27:53,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:27:53,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:27:53,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:27:53,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:27:53,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:27:53,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:27:53,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:27:53,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:27:53,373 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d67b26c9d6dbfd265b32dfe97063f0b6065a61c5709b8120357b3eaad40bf46 [2021-10-20 05:27:53,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:27:53,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:27:53,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:27:53,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:27:53,777 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:27:53,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2021-10-20 05:27:53,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/data/5ee2f6721/2843e7a5cd5942a6b7cc2a25a1aab8da/FLAGf34c4e949 [2021-10-20 05:27:54,506 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:27:54,507 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2021-10-20 05:27:54,527 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/data/5ee2f6721/2843e7a5cd5942a6b7cc2a25a1aab8da/FLAGf34c4e949 [2021-10-20 05:27:54,743 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/data/5ee2f6721/2843e7a5cd5942a6b7cc2a25a1aab8da [2021-10-20 05:27:54,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:27:54,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:27:54,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:27:54,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:27:54,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:27:54,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:27:54" (1/1) ... [2021-10-20 05:27:54,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1f6d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:54, skipping insertion in model container [2021-10-20 05:27:54,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:27:54" (1/1) ... [2021-10-20 05:27:54,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:27:54,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:27:55,051 WARN L228 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_edd5f55a-f904-4e8a-91de-1307b874bdf5/sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2021-10-20 05:27:55,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:27:55,294 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:27:55,312 WARN L228 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_edd5f55a-f904-4e8a-91de-1307b874bdf5/sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2021-10-20 05:27:55,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:27:55,451 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:27:55,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55 WrapperNode [2021-10-20 05:27:55,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:27:55,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:27:55,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:27:55,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:27:55,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:27:55,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:27:55,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:27:55,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:27:55,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:27:55,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:27:55,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:27:55,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:27:55,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (1/1) ... [2021-10-20 05:27:55,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:27:55,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:27:55,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:27:55,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:27:55,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-20 05:27:55,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-20 05:27:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:27:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:27:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-10-20 05:27:55,726 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-10-20 05:27:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-10-20 05:27:55,726 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-10-20 05:27:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-10-20 05:27:55,726 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-10-20 05:27:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:27:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-20 05:27:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:27:55,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:27:55,729 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-20 05:27:56,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:27:56,156 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-20 05:27:56,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:56 BoogieIcfgContainer [2021-10-20 05:27:56,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:27:56,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:27:56,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:27:56,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:27:56,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:27:54" (1/3) ... [2021-10-20 05:27:56,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5628585a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:27:56, skipping insertion in model container [2021-10-20 05:27:56,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:55" (2/3) ... [2021-10-20 05:27:56,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5628585a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:27:56, skipping insertion in model container [2021-10-20 05:27:56,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:56" (3/3) ... [2021-10-20 05:27:56,177 INFO L111 eAbstractionObserver]: Analyzing ICFG safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2021-10-20 05:27:56,183 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-20 05:27:56,183 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:27:56,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:27:56,184 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-20 05:27:56,220 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,220 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,220 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,220 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,221 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,221 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,221 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,221 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,222 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,222 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,222 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,222 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,223 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,223 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,223 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,224 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,224 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,224 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,224 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,224 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,225 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,225 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,225 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,226 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,226 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,226 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,227 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,227 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,227 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,227 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,227 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,227 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,228 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,228 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,228 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,229 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,233 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,233 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,233 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,234 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,240 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,240 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,240 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,240 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,244 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,244 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,245 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,245 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:27:56,247 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-20 05:27:56,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:27:56,311 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 05:27:56,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-20 05:27:56,327 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-20 05:27:56,341 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 84 transitions, 183 flow [2021-10-20 05:27:56,344 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 84 transitions, 183 flow [2021-10-20 05:27:56,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 92 places, 84 transitions, 183 flow [2021-10-20 05:27:56,413 INFO L129 PetriNetUnfolder]: 2/81 cut-off events. [2021-10-20 05:27:56,414 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-20 05:27:56,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 2/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-10-20 05:27:56,436 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2021-10-20 05:28:00,110 INFO L131 LiptonReduction]: Checked pairs total: 2982 [2021-10-20 05:28:00,110 INFO L133 LiptonReduction]: Total number of compositions: 72 [2021-10-20 05:28:00,123 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 57 flow [2021-10-20 05:28:00,161 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 234 states, 233 states have (on average 2.815450643776824) internal successors, (656), 233 states have internal predecessors, (656), 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) [2021-10-20 05:28:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 234 states, 233 states have (on average 2.815450643776824) internal successors, (656), 233 states have internal predecessors, (656), 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) [2021-10-20 05:28:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 05:28:00,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:00,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:00,174 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash -82956535, now seen corresponding path program 1 times [2021-10-20 05:28:00,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:00,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832212314] [2021-10-20 05:28:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:00,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:00,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:00,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832212314] [2021-10-20 05:28:00,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832212314] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:00,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:00,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-20 05:28:00,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136900074] [2021-10-20 05:28:00,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:28:00,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:28:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:28:00,585 INFO L87 Difference]: Start difference. First operand has 234 states, 233 states have (on average 2.815450643776824) internal successors, (656), 233 states have internal predecessors, (656), 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) [2021-10-20 05:28:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:00,668 INFO L93 Difference]: Finished difference Result 349 states and 924 transitions. [2021-10-20 05:28:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:28:00,673 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 [2021-10-20 05:28:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:00,703 INFO L225 Difference]: With dead ends: 349 [2021-10-20 05:28:00,703 INFO L226 Difference]: Without dead ends: 325 [2021-10-20 05:28:00,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:28:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-20 05:28:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 290. [2021-10-20 05:28:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.7231833910034604) internal successors, (787), 289 states have internal predecessors, (787), 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) [2021-10-20 05:28:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 787 transitions. [2021-10-20 05:28:00,820 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 787 transitions. Word has length 8 [2021-10-20 05:28:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:00,821 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 787 transitions. [2021-10-20 05:28:00,822 INFO L471 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) [2021-10-20 05:28:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 787 transitions. [2021-10-20 05:28:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 05:28:00,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:00,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:00,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:28:00,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash 788497753, now seen corresponding path program 1 times [2021-10-20 05:28:00,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:00,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978242510] [2021-10-20 05:28:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:00,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:00,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:00,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978242510] [2021-10-20 05:28:00,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978242510] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:00,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:00,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:28:00,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136262306] [2021-10-20 05:28:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:28:00,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:28:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:28:00,975 INFO L87 Difference]: Start difference. First operand 290 states and 787 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) [2021-10-20 05:28:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:01,015 INFO L93 Difference]: Finished difference Result 308 states and 804 transitions. [2021-10-20 05:28:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:28:01,016 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 [2021-10-20 05:28:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:01,019 INFO L225 Difference]: With dead ends: 308 [2021-10-20 05:28:01,020 INFO L226 Difference]: Without dead ends: 308 [2021-10-20 05:28:01,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:28:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-20 05:28:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 270. [2021-10-20 05:28:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.676579925650558) internal successors, (720), 269 states have internal predecessors, (720), 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) [2021-10-20 05:28:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 720 transitions. [2021-10-20 05:28:01,044 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 720 transitions. Word has length 9 [2021-10-20 05:28:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:01,045 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 720 transitions. [2021-10-20 05:28:01,045 INFO L471 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) [2021-10-20 05:28:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 720 transitions. [2021-10-20 05:28:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 05:28:01,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:01,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:01,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:28:01,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1691827499, now seen corresponding path program 1 times [2021-10-20 05:28:01,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:01,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933563211] [2021-10-20 05:28:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:01,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:01,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:01,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933563211] [2021-10-20 05:28:01,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933563211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:01,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:01,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:28:01,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911269747] [2021-10-20 05:28:01,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:28:01,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:28:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:28:01,224 INFO L87 Difference]: Start difference. First operand 270 states and 720 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) [2021-10-20 05:28:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:01,259 INFO L93 Difference]: Finished difference Result 291 states and 756 transitions. [2021-10-20 05:28:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:28:01,262 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 [2021-10-20 05:28:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:01,269 INFO L225 Difference]: With dead ends: 291 [2021-10-20 05:28:01,270 INFO L226 Difference]: Without dead ends: 291 [2021-10-20 05:28:01,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:28:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-20 05:28:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 248. [2021-10-20 05:28:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6558704453441297) internal successors, (656), 247 states have internal predecessors, (656), 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) [2021-10-20 05:28:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 656 transitions. [2021-10-20 05:28:01,289 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 656 transitions. Word has length 9 [2021-10-20 05:28:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:01,289 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 656 transitions. [2021-10-20 05:28:01,290 INFO L471 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) [2021-10-20 05:28:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 656 transitions. [2021-10-20 05:28:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 05:28:01,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:01,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:01,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:28:01,292 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1357860645, now seen corresponding path program 1 times [2021-10-20 05:28:01,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:01,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599862491] [2021-10-20 05:28:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:01,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:01,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:01,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599862491] [2021-10-20 05:28:01,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599862491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:01,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:01,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:28:01,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593676568] [2021-10-20 05:28:01,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:28:01,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:28:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:28:01,398 INFO L87 Difference]: Start difference. First operand 248 states and 656 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) [2021-10-20 05:28:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:01,430 INFO L93 Difference]: Finished difference Result 268 states and 687 transitions. [2021-10-20 05:28:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:28:01,431 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 [2021-10-20 05:28:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:01,434 INFO L225 Difference]: With dead ends: 268 [2021-10-20 05:28:01,434 INFO L226 Difference]: Without dead ends: 268 [2021-10-20 05:28:01,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:28:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-20 05:28:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 236. [2021-10-20 05:28:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.617021276595745) internal successors, (615), 235 states have internal predecessors, (615), 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) [2021-10-20 05:28:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 615 transitions. [2021-10-20 05:28:01,452 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 615 transitions. Word has length 10 [2021-10-20 05:28:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:01,453 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 615 transitions. [2021-10-20 05:28:01,453 INFO L471 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) [2021-10-20 05:28:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 615 transitions. [2021-10-20 05:28:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 05:28:01,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:01,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:01,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:28:01,457 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 317736599, now seen corresponding path program 1 times [2021-10-20 05:28:01,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:01,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962024885] [2021-10-20 05:28:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:01,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:01,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:01,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962024885] [2021-10-20 05:28:01,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962024885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:01,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:01,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-20 05:28:01,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259387420] [2021-10-20 05:28:01,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:28:01,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:28:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:28:01,564 INFO L87 Difference]: Start difference. First operand 236 states and 615 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-10-20 05:28:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:01,572 INFO L93 Difference]: Finished difference Result 230 states and 596 transitions. [2021-10-20 05:28:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:28:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-10-20 05:28:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:01,576 INFO L225 Difference]: With dead ends: 230 [2021-10-20 05:28:01,576 INFO L226 Difference]: Without dead ends: 230 [2021-10-20 05:28:01,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:28:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-20 05:28:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2021-10-20 05:28:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.624390243902439) internal successors, (538), 205 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:28:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 538 transitions. [2021-10-20 05:28:01,589 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 538 transitions. Word has length 11 [2021-10-20 05:28:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:01,590 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 538 transitions. [2021-10-20 05:28:01,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-10-20 05:28:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 538 transitions. [2021-10-20 05:28:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-20 05:28:01,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:01,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:01,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:28:01,610 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash 765050231, now seen corresponding path program 1 times [2021-10-20 05:28:01,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:01,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952945780] [2021-10-20 05:28:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:01,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:01,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:01,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952945780] [2021-10-20 05:28:01,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952945780] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:01,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:01,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:28:01,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975764373] [2021-10-20 05:28:01,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 05:28:01,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 05:28:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:28:01,692 INFO L87 Difference]: Start difference. First operand 206 states and 538 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:28:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:01,731 INFO L93 Difference]: Finished difference Result 266 states and 658 transitions. [2021-10-20 05:28:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:28:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-20 05:28:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:01,736 INFO L225 Difference]: With dead ends: 266 [2021-10-20 05:28:01,736 INFO L226 Difference]: Without dead ends: 134 [2021-10-20 05:28:01,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:28:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-20 05:28:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-10-20 05:28:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.3140495867768593) internal successors, (280), 121 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:28:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 280 transitions. [2021-10-20 05:28:01,748 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 280 transitions. Word has length 12 [2021-10-20 05:28:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:01,748 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 280 transitions. [2021-10-20 05:28:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:28:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 280 transitions. [2021-10-20 05:28:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-20 05:28:01,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:01,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:01,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 05:28:01,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 184505273, now seen corresponding path program 1 times [2021-10-20 05:28:01,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:01,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343233842] [2021-10-20 05:28:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:01,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:01,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:01,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343233842] [2021-10-20 05:28:01,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343233842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:01,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:01,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:28:01,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489665576] [2021-10-20 05:28:01,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 05:28:01,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 05:28:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:28:01,847 INFO L87 Difference]: Start difference. First operand 122 states and 280 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-20 05:28:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:01,877 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2021-10-20 05:28:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:28:01,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2021-10-20 05:28:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:01,880 INFO L225 Difference]: With dead ends: 142 [2021-10-20 05:28:01,880 INFO L226 Difference]: Without dead ends: 82 [2021-10-20 05:28:01,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:28:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-20 05:28:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-20 05:28:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 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) [2021-10-20 05:28:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-10-20 05:28:01,889 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 13 [2021-10-20 05:28:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:01,889 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-10-20 05:28:01,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-20 05:28:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-10-20 05:28:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 05:28:01,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:28:01,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:28:01,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 05:28:01,891 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:28:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:28:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash -627267697, now seen corresponding path program 1 times [2021-10-20 05:28:01,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:28:01,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828142285] [2021-10-20 05:28:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:28:01,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:28:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:28:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:28:02,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:28:02,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828142285] [2021-10-20 05:28:02,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828142285] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:28:02,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:28:02,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:28:02,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109044341] [2021-10-20 05:28:02,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 05:28:02,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:28:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 05:28:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:28:02,022 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:28:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:28:02,042 INFO L93 Difference]: Finished difference Result 74 states and 154 transitions. [2021-10-20 05:28:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:28:02,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-20 05:28:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:28:02,042 INFO L225 Difference]: With dead ends: 74 [2021-10-20 05:28:02,043 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 05:28:02,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:28:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 05:28:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 05:28:02,043 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) [2021-10-20 05:28:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 05:28:02,044 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-20 05:28:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:28:02,044 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 05:28:02,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:28:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 05:28:02,045 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 05:28:02,047 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:28:02,051 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-20 05:28:02,052 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-20 05:28:02,053 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-20 05:28:02,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-20 05:28:02,058 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-20 05:28:02,058 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:28:02,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:28:02 BasicIcfg [2021-10-20 05:28:02,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:28:02,061 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:28:02,066 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:28:02,066 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:28:02,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:56" (3/4) ... [2021-10-20 05:28:02,070 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 05:28:02,077 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-10-20 05:28:02,078 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-10-20 05:28:02,078 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-10-20 05:28:02,086 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-20 05:28:02,086 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-20 05:28:02,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:28:02,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:28:02,138 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:28:02,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:28:02,140 INFO L168 Benchmark]: Toolchain (without parser) took 7391.71 ms. Allocated memory was 81.8 MB in the beginning and 130.0 MB in the end (delta: 48.2 MB). Free memory was 43.5 MB in the beginning and 67.7 MB in the end (delta: -24.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:28:02,141 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 61.2 MB in the beginning and 61.1 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:28:02,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.30 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 43.3 MB in the beginning and 72.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:28:02,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.65 ms. Allocated memory is still 107.0 MB. Free memory was 72.6 MB in the beginning and 70.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:28:02,142 INFO L168 Benchmark]: Boogie Preprocessor took 66.34 ms. Allocated memory is still 107.0 MB. Free memory was 70.5 MB in the beginning and 69.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:28:02,143 INFO L168 Benchmark]: RCFGBuilder took 545.34 ms. Allocated memory is still 107.0 MB. Free memory was 69.0 MB in the beginning and 56.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:28:02,143 INFO L168 Benchmark]: TraceAbstraction took 5899.33 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 56.4 MB in the beginning and 70.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-20 05:28:02,144 INFO L168 Benchmark]: Witness Printer took 77.07 ms. Allocated memory is still 130.0 MB. Free memory was 70.8 MB in the beginning and 67.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:28:02,146 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 61.2 MB in the beginning and 61.1 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 703.30 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 43.3 MB in the beginning and 72.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.65 ms. Allocated memory is still 107.0 MB. Free memory was 72.6 MB in the beginning and 70.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.34 ms. Allocated memory is still 107.0 MB. Free memory was 70.5 MB in the beginning and 69.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 545.34 ms. Allocated memory is still 107.0 MB. Free memory was 69.0 MB in the beginning and 56.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5899.33 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 56.4 MB in the beginning and 70.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 77.07 ms. Allocated memory is still 130.0 MB. Free memory was 70.8 MB in the beginning and 67.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3766.3ms, 92 PlacesBefore, 31 PlacesAfterwards, 84 TransitionsBefore, 21 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 72 TotalNumberOfCompositions, 2982 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1568, positive: 1459, positive conditional: 0, positive unconditional: 1459, negative: 109, negative conditional: 0, negative unconditional: 109, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 983, positive: 932, positive conditional: 0, positive unconditional: 932, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 983, positive: 919, positive conditional: 0, positive unconditional: 919, negative: 64, negative conditional: 0, negative unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 64, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 182, positive: 51, positive conditional: 0, positive unconditional: 51, negative: 131, negative conditional: 0, negative unconditional: 131, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1568, positive: 527, positive conditional: 0, positive unconditional: 527, negative: 58, negative conditional: 0, negative unconditional: 58, unknown: 983, unknown conditional: 0, unknown unconditional: 983] , Statistics on independence cache: Total cache size (in pairs): 77, Positive cache size: 61, Positive conditional cache size: 0, Positive unconditional cache size: 61, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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, 107 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 5755.1ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 43.9ms, AutomataDifference: 399.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3850.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 135 SDtfs, 176 SDslu, 139 SDs, 0 SdLazy, 56 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=290occurred in iteration=1, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 187.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 184 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 34.2ms SsaConstructionTime, 264.1ms SatisfiabilityAnalysisTime, 707.2ms InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 612 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! [2021-10-20 05:28:02,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd5f55a-f904-4e8a-91de-1307b874bdf5/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...