./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_12.c --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_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/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_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/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_3b12700a-e86a-4f9d-a212-cda8592d7109/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 12c3feea735c5360de013afbcf9aaa3880d39f75cbb7661493cccf003151044d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 05:56:57,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:56:57,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:56:57,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:56:57,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:56:57,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:56:57,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:56:57,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:56:57,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:56:57,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:56:57,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:56:57,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:56:57,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:56:57,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:56:57,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:56:57,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:56:57,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:56:57,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:56:57,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:56:57,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:56:57,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:56:57,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:56:57,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:56:57,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:56:57,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:56:57,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:56:57,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:56:57,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:56:57,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:56:57,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:56:57,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:56:57,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:56:57,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:56:57,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:56:57,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:56:57,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:56:57,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:56:57,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:56:57,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:56:57,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:56:57,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:56:57,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:56:57,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:56:57,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:56:57,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:56:57,562 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:56:57,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:56:57,562 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:56:57,562 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:56:57,563 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:56:57,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:56:57,570 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:56:57,571 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:56:57,571 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:56:57,571 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:56:57,572 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:56:57,572 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:56:57,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:56:57,573 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:56:57,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:56:57,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:56:57,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:56:57,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:56:57,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:56:57,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:56:57,574 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:56:57,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:56:57,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:56:57,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:56:57,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:56:57,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:56:57,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:56:57,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:56:57,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:56:57,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:56:57,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:56:57,579 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:56:57,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:56:57,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:56:57,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:56:57,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:56:57,580 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_3b12700a-e86a-4f9d-a212-cda8592d7109/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12c3feea735c5360de013afbcf9aaa3880d39f75cbb7661493cccf003151044d [2021-10-20 05:56:57,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:56:57,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:56:57,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:56:57,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:56:57,889 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:56:57,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/locks/test_locks_12.c [2021-10-20 05:56:57,962 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/data/fd8caa9e4/c66c692721cb487cad6031c3aab92c63/FLAGcd803d95f [2021-10-20 05:56:58,492 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:56:58,492 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/sv-benchmarks/c/locks/test_locks_12.c [2021-10-20 05:56:58,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/data/fd8caa9e4/c66c692721cb487cad6031c3aab92c63/FLAGcd803d95f [2021-10-20 05:56:58,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/data/fd8caa9e4/c66c692721cb487cad6031c3aab92c63 [2021-10-20 05:56:58,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:56:58,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:56:58,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:56:58,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:56:58,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:56:58,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:56:58" (1/1) ... [2021-10-20 05:56:58,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe6a1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:58, skipping insertion in model container [2021-10-20 05:56:58,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:56:58" (1/1) ... [2021-10-20 05:56:58,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:56:58,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:56:59,153 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_3b12700a-e86a-4f9d-a212-cda8592d7109/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2021-10-20 05:56:59,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:56:59,178 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:56:59,225 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_3b12700a-e86a-4f9d-a212-cda8592d7109/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2021-10-20 05:56:59,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:56:59,240 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:56:59,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59 WrapperNode [2021-10-20 05:56:59,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:56:59,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:56:59,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:56:59,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:56:59,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:56:59,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:56:59,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:56:59,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:56:59,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:56:59,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:56:59,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:56:59,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:56:59,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (1/1) ... [2021-10-20 05:56:59,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:56:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:56:59,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:56:59,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:56:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:56:59,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:56:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:56:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:57:00,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:57:00,046 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-20 05:57:00,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:57:00 BoogieIcfgContainer [2021-10-20 05:57:00,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:57:00,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:57:00,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:57:00,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:57:00,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:56:58" (1/3) ... [2021-10-20 05:57:00,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6593e64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:57:00, skipping insertion in model container [2021-10-20 05:57:00,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:56:59" (2/3) ... [2021-10-20 05:57:00,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6593e64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:57:00, skipping insertion in model container [2021-10-20 05:57:00,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:57:00" (3/3) ... [2021-10-20 05:57:00,060 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2021-10-20 05:57:00,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:57:00,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:57:00,125 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:57:00,132 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 05:57:00,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:57:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 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 05:57:00,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-20 05:57:00,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:00,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-20 05:57:00,156 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1071191421, now seen corresponding path program 1 times [2021-10-20 05:57:00,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:00,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85114110] [2021-10-20 05:57:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:00,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:00,424 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 05:57:00,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:00,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85114110] [2021-10-20 05:57:00,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85114110] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:00,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:00,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:00,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048072934] [2021-10-20 05:57:00,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:00,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:00,454 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 05:57:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:00,505 INFO L93 Difference]: Finished difference Result 66 states and 113 transitions. [2021-10-20 05:57:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:00,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-10-20 05:57:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:00,518 INFO L225 Difference]: With dead ends: 66 [2021-10-20 05:57:00,518 INFO L226 Difference]: Without dead ends: 55 [2021-10-20 05:57:00,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-20 05:57:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2021-10-20 05:57:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:57:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 51 transitions. [2021-10-20 05:57:00,588 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 51 transitions. Word has length 6 [2021-10-20 05:57:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:00,589 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 51 transitions. [2021-10-20 05:57:00,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 05:57:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 51 transitions. [2021-10-20 05:57:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-20 05:57:00,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:00,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:00,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:57:00,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1153017017, now seen corresponding path program 1 times [2021-10-20 05:57:00,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:00,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218743283] [2021-10-20 05:57:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:00,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:00,761 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 05:57:00,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:00,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218743283] [2021-10-20 05:57:00,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218743283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:00,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:00,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:00,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997025718] [2021-10-20 05:57:00,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:00,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:00,772 INFO L87 Difference]: Start difference. First operand 29 states and 51 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 05:57:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:00,831 INFO L93 Difference]: Finished difference Result 55 states and 95 transitions. [2021-10-20 05:57:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-10-20 05:57:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:00,836 INFO L225 Difference]: With dead ends: 55 [2021-10-20 05:57:00,837 INFO L226 Difference]: Without dead ends: 53 [2021-10-20 05:57:00,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-20 05:57:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2021-10-20 05:57:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:57:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 50 transitions. [2021-10-20 05:57:00,847 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 50 transitions. Word has length 7 [2021-10-20 05:57:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:00,848 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 50 transitions. [2021-10-20 05:57:00,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 05:57:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 50 transitions. [2021-10-20 05:57:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 05:57:00,852 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:00,852 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:00,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:57:00,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:00,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1384002200, now seen corresponding path program 1 times [2021-10-20 05:57:00,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:00,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299925209] [2021-10-20 05:57:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:00,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:00,971 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 05:57:00,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:00,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299925209] [2021-10-20 05:57:00,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299925209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:00,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:00,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:00,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670927770] [2021-10-20 05:57:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:00,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:00,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:00,975 INFO L87 Difference]: Start difference. First operand 29 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 05:57:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:00,996 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2021-10-20 05:57:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 05:57:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:00,998 INFO L225 Difference]: With dead ends: 53 [2021-10-20 05:57:00,999 INFO L226 Difference]: Without dead ends: 51 [2021-10-20 05:57:00,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-20 05:57:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-10-20 05:57:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 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 05:57:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 49 transitions. [2021-10-20 05:57:01,005 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 49 transitions. Word has length 8 [2021-10-20 05:57:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,006 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 49 transitions. [2021-10-20 05:57:01,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 05:57:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 49 transitions. [2021-10-20 05:57:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 05:57:01,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:57:01,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash -45391378, now seen corresponding path program 1 times [2021-10-20 05:57:01,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048873044] [2021-10-20 05:57:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:01,091 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 05:57:01,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:01,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048873044] [2021-10-20 05:57:01,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048873044] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:01,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:01,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:01,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445093600] [2021-10-20 05:57:01,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:01,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,094 INFO L87 Difference]: Start difference. First operand 29 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 05:57:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:01,118 INFO L93 Difference]: Finished difference Result 51 states and 85 transitions. [2021-10-20 05:57:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:01,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 05:57:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:01,120 INFO L225 Difference]: With dead ends: 51 [2021-10-20 05:57:01,120 INFO L226 Difference]: Without dead ends: 49 [2021-10-20 05:57:01,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-20 05:57:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 29. [2021-10-20 05:57:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 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 05:57:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 48 transitions. [2021-10-20 05:57:01,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 48 transitions. Word has length 9 [2021-10-20 05:57:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,127 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 48 transitions. [2021-10-20 05:57:01,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 05:57:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 48 transitions. [2021-10-20 05:57:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 05:57:01,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:57:01,129 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1406918995, now seen corresponding path program 1 times [2021-10-20 05:57:01,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313259453] [2021-10-20 05:57:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:01,215 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 05:57:01,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:01,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313259453] [2021-10-20 05:57:01,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313259453] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:01,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:01,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:01,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843328962] [2021-10-20 05:57:01,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:01,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:01,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,221 INFO L87 Difference]: Start difference. First operand 29 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 05:57:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:01,258 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2021-10-20 05:57:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 05:57:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:01,262 INFO L225 Difference]: With dead ends: 49 [2021-10-20 05:57:01,263 INFO L226 Difference]: Without dead ends: 47 [2021-10-20 05:57:01,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-20 05:57:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2021-10-20 05:57:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 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 05:57:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 47 transitions. [2021-10-20 05:57:01,271 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 47 transitions. Word has length 10 [2021-10-20 05:57:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 47 transitions. [2021-10-20 05:57:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 05:57:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 47 transitions. [2021-10-20 05:57:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 05:57:01,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,273 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:57:01,273 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash -664601821, now seen corresponding path program 1 times [2021-10-20 05:57:01,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883950286] [2021-10-20 05:57:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:01,365 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 05:57:01,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:01,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883950286] [2021-10-20 05:57:01,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883950286] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:01,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:01,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:01,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110936192] [2021-10-20 05:57:01,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:01,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,368 INFO L87 Difference]: Start difference. First operand 29 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:57:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:01,400 INFO L93 Difference]: Finished difference Result 47 states and 75 transitions. [2021-10-20 05:57:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:01,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-20 05:57:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:01,402 INFO L225 Difference]: With dead ends: 47 [2021-10-20 05:57:01,402 INFO L226 Difference]: Without dead ends: 45 [2021-10-20 05:57:01,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-20 05:57:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2021-10-20 05:57:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 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 05:57:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 46 transitions. [2021-10-20 05:57:01,409 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 46 transitions. Word has length 11 [2021-10-20 05:57:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,410 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 46 transitions. [2021-10-20 05:57:01,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:57:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 46 transitions. [2021-10-20 05:57:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-20 05:57:01,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 05:57:01,411 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash 872394434, now seen corresponding path program 1 times [2021-10-20 05:57:01,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968230577] [2021-10-20 05:57:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:01,502 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 05:57:01,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:01,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968230577] [2021-10-20 05:57:01,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968230577] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:01,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:01,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:01,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992694670] [2021-10-20 05:57:01,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:01,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,506 INFO L87 Difference]: Start difference. First operand 29 states and 46 transitions. Second operand has 4 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 05:57:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:01,538 INFO L93 Difference]: Finished difference Result 45 states and 70 transitions. [2021-10-20 05:57:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 05:57:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:01,540 INFO L225 Difference]: With dead ends: 45 [2021-10-20 05:57:01,540 INFO L226 Difference]: Without dead ends: 43 [2021-10-20 05:57:01,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-20 05:57:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-10-20 05:57:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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 05:57:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 45 transitions. [2021-10-20 05:57:01,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 45 transitions. Word has length 12 [2021-10-20 05:57:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,545 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 45 transitions. [2021-10-20 05:57:01,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 05:57:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 45 transitions. [2021-10-20 05:57:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-20 05:57:01,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,547 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 05:57:01,547 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1274638424, now seen corresponding path program 1 times [2021-10-20 05:57:01,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324862073] [2021-10-20 05:57:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:01,664 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 05:57:01,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:01,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324862073] [2021-10-20 05:57:01,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324862073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:01,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:01,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:01,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254012906] [2021-10-20 05:57:01,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:01,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,669 INFO L87 Difference]: Start difference. First operand 29 states and 45 transitions. Second operand has 4 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 05:57:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:01,695 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2021-10-20 05:57:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 05:57:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:01,699 INFO L225 Difference]: With dead ends: 43 [2021-10-20 05:57:01,699 INFO L226 Difference]: Without dead ends: 41 [2021-10-20 05:57:01,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-20 05:57:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2021-10-20 05:57:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 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 05:57:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2021-10-20 05:57:01,716 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 13 [2021-10-20 05:57:01,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,717 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2021-10-20 05:57:01,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 05:57:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2021-10-20 05:57:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 05:57:01,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,719 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-20 05:57:01,720 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,722 INFO L82 PathProgramCache]: Analyzing trace with hash 859300567, now seen corresponding path program 1 times [2021-10-20 05:57:01,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661480097] [2021-10-20 05:57:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:01,810 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 05:57:01,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:01,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661480097] [2021-10-20 05:57:01,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661480097] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:01,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:01,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:01,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373651279] [2021-10-20 05:57:01,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,821 INFO L87 Difference]: Start difference. First operand 29 states and 44 transitions. Second operand has 4 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 05:57:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:01,848 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-10-20 05:57:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 05:57:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:01,857 INFO L225 Difference]: With dead ends: 41 [2021-10-20 05:57:01,857 INFO L226 Difference]: Without dead ends: 39 [2021-10-20 05:57:01,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-20 05:57:01,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-10-20 05:57:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 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 05:57:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 43 transitions. [2021-10-20 05:57:01,868 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 43 transitions. Word has length 14 [2021-10-20 05:57:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,869 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 43 transitions. [2021-10-20 05:57:01,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 05:57:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 43 transitions. [2021-10-20 05:57:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-20 05:57:01,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-20 05:57:01,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 868729229, now seen corresponding path program 1 times [2021-10-20 05:57:01,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352417518] [2021-10-20 05:57:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:01,949 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 05:57:01,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:01,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352417518] [2021-10-20 05:57:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352417518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:01,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:01,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:01,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629546289] [2021-10-20 05:57:01,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:01,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,952 INFO L87 Difference]: Start difference. First operand 29 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 05:57:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:01,973 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2021-10-20 05:57:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-10-20 05:57:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:01,974 INFO L225 Difference]: With dead ends: 39 [2021-10-20 05:57:01,974 INFO L226 Difference]: Without dead ends: 37 [2021-10-20 05:57:01,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-20 05:57:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-10-20 05:57:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 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 05:57:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2021-10-20 05:57:01,983 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 15 [2021-10-20 05:57:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:01,987 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2021-10-20 05:57:01,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 05:57:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2021-10-20 05:57:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 05:57:01,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:01,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:01,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-20 05:57:01,990 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1161018092, now seen corresponding path program 1 times [2021-10-20 05:57:01,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:01,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167293681] [2021-10-20 05:57:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:01,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:02,042 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 05:57:02,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:02,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167293681] [2021-10-20 05:57:02,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167293681] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:02,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:02,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:02,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125609428] [2021-10-20 05:57:02,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:02,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:02,046 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:57:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:02,070 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-10-20 05:57:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:02,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-20 05:57:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:02,072 INFO L225 Difference]: With dead ends: 37 [2021-10-20 05:57:02,073 INFO L226 Difference]: Without dead ends: 35 [2021-10-20 05:57:02,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-20 05:57:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-10-20 05:57:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 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 05:57:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2021-10-20 05:57:02,080 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 16 [2021-10-20 05:57:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:02,081 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2021-10-20 05:57:02,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:57:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2021-10-20 05:57:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-20 05:57:02,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:57:02,083 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:57:02,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-20 05:57:02,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:57:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:57:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1632038594, now seen corresponding path program 1 times [2021-10-20 05:57:02,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:57:02,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132528237] [2021-10-20 05:57:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:57:02,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:57:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:57:02,145 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 05:57:02,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:57:02,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132528237] [2021-10-20 05:57:02,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132528237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:57:02,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:57:02,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:57:02,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457542729] [2021-10-20 05:57:02,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:57:02,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:57:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:57:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:02,154 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 05:57:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:57:02,171 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2021-10-20 05:57:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:57:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2021-10-20 05:57:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:57:02,172 INFO L225 Difference]: With dead ends: 31 [2021-10-20 05:57:02,172 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 05:57:02,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:57:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 05:57:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 05:57:02,175 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 05:57:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 05:57:02,175 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-20 05:57:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:57:02,181 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 05:57:02,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 05:57:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 05:57:02,181 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 05:57:02,184 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:57:02,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-20 05:57:02,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 05:57:02,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:57:02,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:57:02,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:57:02,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:57:02,202 INFO L857 garLoopResultBuilder]: For program point L184(line 184) no Hoare annotation was computed. [2021-10-20 05:57:02,202 INFO L853 garLoopResultBuilder]: At program point L184-1(lines 7 193) the Hoare annotation is: false [2021-10-20 05:57:02,202 INFO L857 garLoopResultBuilder]: For program point L168-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,202 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 05:57:02,202 INFO L857 garLoopResultBuilder]: For program point L169(line 169) no Hoare annotation was computed. [2021-10-20 05:57:02,202 INFO L857 garLoopResultBuilder]: For program point L153-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,203 INFO L857 garLoopResultBuilder]: For program point L154(line 154) no Hoare annotation was computed. [2021-10-20 05:57:02,203 INFO L857 garLoopResultBuilder]: For program point L138-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,203 INFO L857 garLoopResultBuilder]: For program point L122-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,203 INFO L857 garLoopResultBuilder]: For program point L139(line 139) no Hoare annotation was computed. [2021-10-20 05:57:02,203 INFO L860 garLoopResultBuilder]: At program point L189(lines 7 193) the Hoare annotation is: true [2021-10-20 05:57:02,203 INFO L857 garLoopResultBuilder]: For program point L173-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,203 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 05:57:02,203 INFO L857 garLoopResultBuilder]: For program point L174(line 174) no Hoare annotation was computed. [2021-10-20 05:57:02,204 INFO L857 garLoopResultBuilder]: For program point L158-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,204 INFO L860 garLoopResultBuilder]: At program point L192(lines 6 193) the Hoare annotation is: true [2021-10-20 05:57:02,204 INFO L857 garLoopResultBuilder]: For program point L159(line 159) no Hoare annotation was computed. [2021-10-20 05:57:02,204 INFO L857 garLoopResultBuilder]: For program point L143-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,204 INFO L857 garLoopResultBuilder]: For program point L144(line 144) no Hoare annotation was computed. [2021-10-20 05:57:02,204 INFO L857 garLoopResultBuilder]: For program point L128-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,204 INFO L857 garLoopResultBuilder]: For program point L178-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,205 INFO L857 garLoopResultBuilder]: For program point L129(line 129) no Hoare annotation was computed. [2021-10-20 05:57:02,205 INFO L857 garLoopResultBuilder]: For program point L179(line 179) no Hoare annotation was computed. [2021-10-20 05:57:02,205 INFO L857 garLoopResultBuilder]: For program point L163-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,205 INFO L857 garLoopResultBuilder]: For program point L164(line 164) no Hoare annotation was computed. [2021-10-20 05:57:02,205 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 191) no Hoare annotation was computed. [2021-10-20 05:57:02,205 INFO L857 garLoopResultBuilder]: For program point L148-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,205 INFO L857 garLoopResultBuilder]: For program point L49(lines 49 51) no Hoare annotation was computed. [2021-10-20 05:57:02,206 INFO L857 garLoopResultBuilder]: For program point L149(line 149) no Hoare annotation was computed. [2021-10-20 05:57:02,206 INFO L857 garLoopResultBuilder]: For program point L133-1(lines 47 188) no Hoare annotation was computed. [2021-10-20 05:57:02,206 INFO L860 garLoopResultBuilder]: At program point L183-1(lines 47 188) the Hoare annotation is: true [2021-10-20 05:57:02,206 INFO L857 garLoopResultBuilder]: For program point L134(line 134) no Hoare annotation was computed. [2021-10-20 05:57:02,210 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:57:02,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:57:02 BoogieIcfgContainer [2021-10-20 05:57:02,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:57:02,219 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:57:02,219 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:57:02,219 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:57:02,219 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:57:00" (3/4) ... [2021-10-20 05:57:02,222 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 05:57:02,234 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-20 05:57:02,235 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-20 05:57:02,235 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-20 05:57:02,236 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:57:02,282 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:57:02,283 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:57:02,284 INFO L168 Benchmark]: Toolchain (without parser) took 3444.04 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 76.0 MB in the beginning and 70.4 MB in the end (delta: 5.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:57:02,285 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 84.8 MB in the end (delta: 30.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:57:02,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.27 ms. Allocated memory is still 111.1 MB. Free memory was 75.7 MB in the beginning and 86.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:57:02,285 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.34 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 84.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:57:02,286 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:57:02,286 INFO L168 Benchmark]: RCFGBuilder took 738.60 ms. Allocated memory is still 111.1 MB. Free memory was 83.4 MB in the beginning and 58.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:57:02,287 INFO L168 Benchmark]: TraceAbstraction took 2167.46 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 57.7 MB in the beginning and 74.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:57:02,287 INFO L168 Benchmark]: Witness Printer took 64.01 ms. Allocated memory is still 134.2 MB. Free memory was 74.6 MB in the beginning and 70.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:57:02,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 84.8 MB in the end (delta: 30.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 400.27 ms. Allocated memory is still 111.1 MB. Free memory was 75.7 MB in the beginning and 86.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.34 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 84.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.49 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 738.60 ms. Allocated memory is still 111.1 MB. Free memory was 83.4 MB in the beginning and 58.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2167.46 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 57.7 MB in the beginning and 74.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Witness Printer took 64.01 ms. Allocated memory is still 134.2 MB. Free memory was 74.6 MB in the beginning and 70.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 191]: 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 CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2087.6ms, OverallIterations: 12, TraceHistogramMax: 1, EmptinessCheckTime: 23.2ms, AutomataDifference: 473.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16.2ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 527 SDtfs, 446 SDslu, 785 SDs, 0 SdLazy, 116 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 201.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 102.8ms AutomataMinimizationTime, 12 MinimizatonAttempts, 176 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 6.9ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 48.2ms SsaConstructionTime, 310.8ms SatisfiabilityAnalysisTime, 766.0ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 618 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-20 05:57:02,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b12700a-e86a-4f9d-a212-cda8592d7109/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...