./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:40:29,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:40:29,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:40:29,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:40:29,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:40:29,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:40:29,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:40:29,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:40:29,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:40:29,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:40:29,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:40:29,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:40:29,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:40:29,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:40:29,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:40:29,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:40:29,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:40:29,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:40:29,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:40:29,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:40:29,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:40:29,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:40:29,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:40:29,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:40:29,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:40:29,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:40:29,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:40:29,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:40:29,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:40:29,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:40:29,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:40:29,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:40:29,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:40:29,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:40:29,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:40:29,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:40:29,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:40:29,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:40:29,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:40:29,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:40:29,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:40:29,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-29 05:40:29,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:40:29,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:40:29,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:40:29,428 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:40:29,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:40:29,429 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:40:29,429 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:40:29,429 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:40:29,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:40:29,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:40:29,430 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:40:29,431 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:40:29,431 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:40:29,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:40:29,431 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:40:29,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:40:29,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:40:29,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:40:29,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:40:29,437 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:40:29,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:40:29,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:40:29,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:40:29,438 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:40:29,438 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:40:29,438 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 05:40:29,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:40:29,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:40:29,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:40:29,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:40:29,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:40:29,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:40:29,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:40:29,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:40:29,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:40:29,442 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:40:29,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:40:29,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:40:29,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:40:29,444 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_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 [2021-10-29 05:40:29,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:40:29,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:40:29,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:40:29,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:40:29,771 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:40:29,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-29 05:40:29,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/0eba602c9/b6cd3dc828674607ab04cd94697badd2/FLAGcffec03f8 [2021-10-29 05:40:30,321 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:40:30,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-29 05:40:30,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/0eba602c9/b6cd3dc828674607ab04cd94697badd2/FLAGcffec03f8 [2021-10-29 05:40:30,850 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/0eba602c9/b6cd3dc828674607ab04cd94697badd2 [2021-10-29 05:40:30,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:40:30,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:40:30,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:40:30,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:40:30,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:40:30,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:40:30" (1/1) ... [2021-10-29 05:40:30,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135d3c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:30, skipping insertion in model container [2021-10-29 05:40:30,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:40:30" (1/1) ... [2021-10-29 05:40:30,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:40:30,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:40:31,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:40:31,225 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:40:31,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:40:31,299 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:40:31,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31 WrapperNode [2021-10-29 05:40:31,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:40:31,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:40:31,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:40:31,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:40:31,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:40:31,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:40:31,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:40:31,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:40:31,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:40:31,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:40:31,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:40:31,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:40:31,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (1/1) ... [2021-10-29 05:40:31,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:40:31,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:40:31,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:40:31,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:40:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 05:40:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 05:40:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:40:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:40:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:40:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:40:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:40:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:40:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:40:31,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:40:32,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:40:32,117 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-29 05:40:32,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:40:32 BoogieIcfgContainer [2021-10-29 05:40:32,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:40:32,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:40:32,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:40:32,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:40:32,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:40:30" (1/3) ... [2021-10-29 05:40:32,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6577de04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:40:32, skipping insertion in model container [2021-10-29 05:40:32,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:31" (2/3) ... [2021-10-29 05:40:32,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6577de04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:40:32, skipping insertion in model container [2021-10-29 05:40:32,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:40:32" (3/3) ... [2021-10-29 05:40:32,129 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-10-29 05:40:32,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:40:32,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-29 05:40:32,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:40:32,201 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-29 05:40:32,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-29 05:40:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 26 states have (on average 2.269230769230769) internal successors, (59), 46 states have internal predecessors, (59), 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) [2021-10-29 05:40:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 05:40:32,224 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:32,225 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 05:40:32,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash 5879242, now seen corresponding path program 1 times [2021-10-29 05:40:32,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:32,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677738768] [2021-10-29 05:40:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:32,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:32,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:32,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677738768] [2021-10-29 05:40:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677738768] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:32,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:32,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:40:32,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341785715] [2021-10-29 05:40:32,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:40:32,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:40:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:40:32,463 INFO L87 Difference]: Start difference. First operand has 47 states, 26 states have (on average 2.269230769230769) internal successors, (59), 46 states have internal predecessors, (59), 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 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-29 05:40:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:32,480 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-10-29 05:40:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:40:32,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-29 05:40:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:32,496 INFO L225 Difference]: With dead ends: 47 [2021-10-29 05:40:32,496 INFO L226 Difference]: Without dead ends: 46 [2021-10-29 05:40:32,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:40:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-29 05:40:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-29 05:40:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 45 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) [2021-10-29 05:40:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-10-29 05:40:32,536 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 4 [2021-10-29 05:40:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:32,537 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-10-29 05:40:32,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-29 05:40:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-10-29 05:40:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:40:32,538 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:32,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:40:32,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:40:32,539 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:32,542 INFO L85 PathProgramCache]: Analyzing trace with hash 183444173, now seen corresponding path program 1 times [2021-10-29 05:40:32,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:32,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947232003] [2021-10-29 05:40:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:32,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:32,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:32,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947232003] [2021-10-29 05:40:32,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947232003] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:32,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:32,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-29 05:40:32,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850538801] [2021-10-29 05:40:32,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:40:32,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:40:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:32,660 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-29 05:40:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:32,743 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2021-10-29 05:40:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:40:32,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-29 05:40:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:32,747 INFO L225 Difference]: With dead ends: 84 [2021-10-29 05:40:32,748 INFO L226 Difference]: Without dead ends: 83 [2021-10-29 05:40:32,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-29 05:40:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-29 05:40:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 63 states have internal predecessors, (96), 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) [2021-10-29 05:40:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 96 transitions. [2021-10-29 05:40:32,769 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 96 transitions. Word has length 5 [2021-10-29 05:40:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:32,769 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 96 transitions. [2021-10-29 05:40:32,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-29 05:40:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 96 transitions. [2021-10-29 05:40:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:40:32,770 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:32,771 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:40:32,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:40:32,774 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 183442981, now seen corresponding path program 1 times [2021-10-29 05:40:32,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:32,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494103427] [2021-10-29 05:40:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:32,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:32,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:32,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494103427] [2021-10-29 05:40:32,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494103427] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:32,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:40:32,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348340869] [2021-10-29 05:40:32,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:40:32,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:32,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:40:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:32,864 INFO L87 Difference]: Start difference. First operand 64 states and 96 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-29 05:40:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:32,912 INFO L93 Difference]: Finished difference Result 116 states and 179 transitions. [2021-10-29 05:40:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:40:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-29 05:40:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:32,914 INFO L225 Difference]: With dead ends: 116 [2021-10-29 05:40:32,916 INFO L226 Difference]: Without dead ends: 115 [2021-10-29 05:40:32,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-29 05:40:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2021-10-29 05:40:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 2.155844155844156) internal successors, (166), 96 states have internal predecessors, (166), 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) [2021-10-29 05:40:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 166 transitions. [2021-10-29 05:40:32,930 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 166 transitions. Word has length 5 [2021-10-29 05:40:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:32,930 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 166 transitions. [2021-10-29 05:40:32,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-29 05:40:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 166 transitions. [2021-10-29 05:40:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:40:32,931 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:32,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:40:32,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:40:32,932 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1391708690, now seen corresponding path program 1 times [2021-10-29 05:40:32,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:32,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842427637] [2021-10-29 05:40:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:32,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:33,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:33,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842427637] [2021-10-29 05:40:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842427637] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:33,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:33,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:40:33,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505636850] [2021-10-29 05:40:33,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:40:33,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:40:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:33,025 INFO L87 Difference]: Start difference. First operand 97 states and 166 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:33,112 INFO L93 Difference]: Finished difference Result 146 states and 235 transitions. [2021-10-29 05:40:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:40:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-10-29 05:40:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:33,116 INFO L225 Difference]: With dead ends: 146 [2021-10-29 05:40:33,116 INFO L226 Difference]: Without dead ends: 146 [2021-10-29 05:40:33,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-29 05:40:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 127. [2021-10-29 05:40:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 126 states have internal predecessors, (223), 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) [2021-10-29 05:40:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 223 transitions. [2021-10-29 05:40:33,144 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 223 transitions. Word has length 6 [2021-10-29 05:40:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:33,145 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 223 transitions. [2021-10-29 05:40:33,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 223 transitions. [2021-10-29 05:40:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:40:33,146 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:33,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:40:33,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:40:33,147 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1391708691, now seen corresponding path program 1 times [2021-10-29 05:40:33,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:33,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687341096] [2021-10-29 05:40:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:33,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:33,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:33,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687341096] [2021-10-29 05:40:33,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687341096] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:33,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:33,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:40:33,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452747433] [2021-10-29 05:40:33,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:40:33,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:40:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:33,227 INFO L87 Difference]: Start difference. First operand 127 states and 223 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:33,292 INFO L93 Difference]: Finished difference Result 141 states and 226 transitions. [2021-10-29 05:40:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:40:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-10-29 05:40:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:33,294 INFO L225 Difference]: With dead ends: 141 [2021-10-29 05:40:33,294 INFO L226 Difference]: Without dead ends: 141 [2021-10-29 05:40:33,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-29 05:40:33,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2021-10-29 05:40:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.9724770642201834) internal successors, (215), 124 states have internal predecessors, (215), 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) [2021-10-29 05:40:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 215 transitions. [2021-10-29 05:40:33,317 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 215 transitions. Word has length 6 [2021-10-29 05:40:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:33,317 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 215 transitions. [2021-10-29 05:40:33,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 215 transitions. [2021-10-29 05:40:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:40:33,319 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:33,319 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:33,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 05:40:33,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash 193304434, now seen corresponding path program 1 times [2021-10-29 05:40:33,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:33,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548216745] [2021-10-29 05:40:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:33,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:33,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:33,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548216745] [2021-10-29 05:40:33,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548216745] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:33,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:33,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:40:33,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449214581] [2021-10-29 05:40:33,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:40:33,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:40:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:40:33,390 INFO L87 Difference]: Start difference. First operand 125 states and 215 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-29 05:40:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:33,413 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2021-10-29 05:40:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:40:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-10-29 05:40:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:33,415 INFO L225 Difference]: With dead ends: 136 [2021-10-29 05:40:33,415 INFO L226 Difference]: Without dead ends: 136 [2021-10-29 05:40:33,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:40:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-29 05:40:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 79. [2021-10-29 05:40:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 78 states have internal predecessors, (124), 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) [2021-10-29 05:40:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2021-10-29 05:40:33,429 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 7 [2021-10-29 05:40:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:33,429 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2021-10-29 05:40:33,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-29 05:40:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2021-10-29 05:40:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:40:33,430 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:33,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:33,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 05:40:33,431 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:33,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1747871635, now seen corresponding path program 1 times [2021-10-29 05:40:33,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:33,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217232907] [2021-10-29 05:40:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:33,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:33,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:40:33,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217232907] [2021-10-29 05:40:33,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217232907] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:33,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:33,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:40:33,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660931560] [2021-10-29 05:40:33,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:40:33,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:40:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:40:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:40:33,501 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-10-29 05:40:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:33,540 INFO L93 Difference]: Finished difference Result 173 states and 247 transitions. [2021-10-29 05:40:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:40:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2021-10-29 05:40:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:33,543 INFO L225 Difference]: With dead ends: 173 [2021-10-29 05:40:33,543 INFO L226 Difference]: Without dead ends: 173 [2021-10-29 05:40:33,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:40:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-29 05:40:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2021-10-29 05:40:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 112 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:40:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 173 transitions. [2021-10-29 05:40:33,552 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 173 transitions. Word has length 8 [2021-10-29 05:40:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:33,552 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 173 transitions. [2021-10-29 05:40:33,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-10-29 05:40:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 173 transitions. [2021-10-29 05:40:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:40:33,553 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:33,553 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:33,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 05:40:33,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:33,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1589040439, now seen corresponding path program 1 times [2021-10-29 05:40:33,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:40:33,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524175453] [2021-10-29 05:40:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:33,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:40:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:40:33,573 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:40:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:40:33,631 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:40:33,631 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:40:33,632 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:40:33,635 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:40:33,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:40:33,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-29 05:40:33,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:40:33,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:40:33,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:40:33,637 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-29 05:40:33,637 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:40:33,637 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-29 05:40:33,637 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-29 05:40:33,637 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-29 05:40:33,638 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-29 05:40:33,638 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-29 05:40:33,638 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-29 05:40:33,638 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-29 05:40:33,639 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-29 05:40:33,639 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:40:33,639 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:40:33,639 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:40:33,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 05:40:33,643 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:33,646 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:40:33,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:40:33 BoogieIcfgContainer [2021-10-29 05:40:33,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:40:33,679 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:40:33,679 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:40:33,679 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:40:33,680 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:40:32" (3/4) ... [2021-10-29 05:40:33,683 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:40:33,683 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:40:33,684 INFO L168 Benchmark]: Toolchain (without parser) took 2828.96 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.4 MB in the beginning and 66.5 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:33,685 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 64.1 MB in the beginning and 64.1 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:40:33,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 444.05 ms. Allocated memory is still 94.4 MB. Free memory was 56.2 MB in the beginning and 60.4 MB in the end (delta: -4.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:33,685 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.83 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 58.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:33,686 INFO L168 Benchmark]: Boogie Preprocessor took 29.41 ms. Allocated memory is still 94.4 MB. Free memory was 58.4 MB in the beginning and 56.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:33,686 INFO L168 Benchmark]: RCFGBuilder took 738.09 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.7 MB in the beginning and 87.6 MB in the end (delta: -30.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:33,687 INFO L168 Benchmark]: TraceAbstraction took 1556.63 ms. Allocated memory is still 113.2 MB. Free memory was 86.8 MB in the beginning and 66.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:33,687 INFO L168 Benchmark]: Witness Printer took 3.67 ms. Allocated memory is still 113.2 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:40:33,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 64.1 MB in the beginning and 64.1 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 444.05 ms. Allocated memory is still 94.4 MB. Free memory was 56.2 MB in the beginning and 60.4 MB in the end (delta: -4.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.83 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 58.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.41 ms. Allocated memory is still 94.4 MB. Free memory was 58.4 MB in the beginning and 56.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 738.09 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.7 MB in the beginning and 87.6 MB in the end (delta: -30.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1556.63 ms. Allocated memory is still 113.2 MB. Free memory was 86.8 MB in the beginning and 66.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. * Witness Printer took 3.67 ms. Allocated memory is still 113.2 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 482 SDtfs, 325 SDslu, 295 SDs, 0 SdLazy, 148 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=4, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 84 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:40:33,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:40:36,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:40:36,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:40:36,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:40:36,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:40:36,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:40:36,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:40:36,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:40:36,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:40:36,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:40:36,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:40:36,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:40:36,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:40:36,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:40:36,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:40:36,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:40:36,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:40:36,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:40:36,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:40:36,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:40:36,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:40:36,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:40:36,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:40:36,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:40:36,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:40:36,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:40:36,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:40:36,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:40:36,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:40:36,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:40:36,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:40:36,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:40:36,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:40:36,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:40:36,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:40:36,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:40:36,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:40:36,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:40:36,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:40:36,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:40:36,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:40:36,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-29 05:40:36,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:40:36,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:40:36,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:40:36,344 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:40:36,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:40:36,344 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:40:36,344 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:40:36,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:40:36,345 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:40:36,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:40:36,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:40:36,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:40:36,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:40:36,346 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:40:36,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:40:36,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:40:36,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:40:36,347 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:40:36,347 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:40:36,347 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 05:40:36,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:40:36,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:40:36,348 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:40:36,348 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:40:36,348 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:40:36,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:40:36,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:40:36,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:40:36,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:40:36,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:40:36,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:40:36,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:40:36,350 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:40:36,350 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:40:36,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:40:36,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:40:36,351 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31ec15b2e966aee42d8cde3b6798712776e0e885e8b3f5267212ea76fdd72bb4 [2021-10-29 05:40:36,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:40:36,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:40:36,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:40:36,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:40:36,741 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:40:36,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-29 05:40:36,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/c2a57a1bb/8338d6a8b1c84d71b1a1bd8a7a6d50c7/FLAG775c8fca2 [2021-10-29 05:40:37,456 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:40:37,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-10-29 05:40:37,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/c2a57a1bb/8338d6a8b1c84d71b1a1bd8a7a6d50c7/FLAG775c8fca2 [2021-10-29 05:40:37,741 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/data/c2a57a1bb/8338d6a8b1c84d71b1a1bd8a7a6d50c7 [2021-10-29 05:40:37,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:40:37,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:40:37,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:40:37,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:40:37,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:40:37,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:40:37" (1/1) ... [2021-10-29 05:40:37,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53fb6e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:37, skipping insertion in model container [2021-10-29 05:40:37,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:40:37" (1/1) ... [2021-10-29 05:40:37,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:40:37,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:40:38,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:40:38,200 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:40:38,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:40:38,310 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:40:38,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38 WrapperNode [2021-10-29 05:40:38,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:40:38,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:40:38,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:40:38,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:40:38,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:40:38,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:40:38,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:40:38,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:40:38,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:40:38,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:40:38,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:40:38,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:40:38,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (1/1) ... [2021-10-29 05:40:38,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:40:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:40:38,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:40:38,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:40:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 05:40:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:40:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:40:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:40:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:40:38,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:40:38,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-29 05:40:38,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:40:38,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:40:38,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:40:39,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:40:39,114 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-29 05:40:39,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:40:39 BoogieIcfgContainer [2021-10-29 05:40:39,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:40:39,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:40:39,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:40:39,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:40:39,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:40:37" (1/3) ... [2021-10-29 05:40:39,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14176488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:40:39, skipping insertion in model container [2021-10-29 05:40:39,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:40:38" (2/3) ... [2021-10-29 05:40:39,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14176488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:40:39, skipping insertion in model container [2021-10-29 05:40:39,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:40:39" (3/3) ... [2021-10-29 05:40:39,124 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-10-29 05:40:39,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:40:39,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-29 05:40:39,173 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:40:39,179 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-29 05:40:39,180 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-29 05:40:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 39 states have (on average 2.0) internal successors, (78), 59 states have internal predecessors, (78), 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) [2021-10-29 05:40:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:40:39,200 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:39,201 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:40:39,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash 28701576, now seen corresponding path program 1 times [2021-10-29 05:40:39,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:39,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246078787] [2021-10-29 05:40:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:39,220 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:39,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:39,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:39,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:40:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:40:39,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:39,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:39,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:40:39,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246078787] [2021-10-29 05:40:39,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246078787] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:39,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:39,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:40:39,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334984753] [2021-10-29 05:40:39,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:40:39,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:40:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:40:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:39,541 INFO L87 Difference]: Start difference. First operand has 60 states, 39 states have (on average 2.0) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-29 05:40:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:39,622 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2021-10-29 05:40:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:40:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-29 05:40:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:39,634 INFO L225 Difference]: With dead ends: 103 [2021-10-29 05:40:39,634 INFO L226 Difference]: Without dead ends: 101 [2021-10-29 05:40:39,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-29 05:40:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-10-29 05:40:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 82 states have internal predecessors, (125), 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) [2021-10-29 05:40:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2021-10-29 05:40:39,688 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 5 [2021-10-29 05:40:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2021-10-29 05:40:39,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-29 05:40:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2021-10-29 05:40:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:40:39,690 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:39,690 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:40:39,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:39,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:40:39,896 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash 889747453, now seen corresponding path program 1 times [2021-10-29 05:40:39,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:39,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64595897] [2021-10-29 05:40:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:39,898 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:39,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:39,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:40:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:40:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:40,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:40,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:40:40,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64595897] [2021-10-29 05:40:40,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64595897] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:40,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:40,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:40:40,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908216916] [2021-10-29 05:40:40,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:40:40,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:40:40,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:40:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:40,046 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:40,196 INFO L93 Difference]: Finished difference Result 155 states and 235 transitions. [2021-10-29 05:40:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:40:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-10-29 05:40:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:40,200 INFO L225 Difference]: With dead ends: 155 [2021-10-29 05:40:40,200 INFO L226 Difference]: Without dead ends: 152 [2021-10-29 05:40:40,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-29 05:40:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2021-10-29 05:40:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 131 states have internal predecessors, (221), 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) [2021-10-29 05:40:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 221 transitions. [2021-10-29 05:40:40,234 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 221 transitions. Word has length 6 [2021-10-29 05:40:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:40,236 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 221 transitions. [2021-10-29 05:40:40,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 221 transitions. [2021-10-29 05:40:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:40:40,238 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:40,238 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:40:40,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:40,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:40:40,449 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:40,450 INFO L85 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2021-10-29 05:40:40,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:40,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719101327] [2021-10-29 05:40:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:40,451 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:40,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:40,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:40,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:40:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:40:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:40,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-29 05:40:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:40,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:40,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:40:40,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719101327] [2021-10-29 05:40:40,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719101327] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:40,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:40,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:40:40,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019950783] [2021-10-29 05:40:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:40:40,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:40:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:40:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:40,657 INFO L87 Difference]: Start difference. First operand 132 states and 221 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:40,831 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2021-10-29 05:40:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:40:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-10-29 05:40:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:40,834 INFO L225 Difference]: With dead ends: 199 [2021-10-29 05:40:40,834 INFO L226 Difference]: Without dead ends: 199 [2021-10-29 05:40:40,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:40:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-29 05:40:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-10-29 05:40:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 160 states have (on average 1.9) internal successors, (304), 177 states have internal predecessors, (304), 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) [2021-10-29 05:40:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 304 transitions. [2021-10-29 05:40:40,853 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 304 transitions. Word has length 6 [2021-10-29 05:40:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 304 transitions. [2021-10-29 05:40:40,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-29 05:40:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 304 transitions. [2021-10-29 05:40:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:40:40,855 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:40,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:40:40,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:41,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:40:41,056 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:41,056 INFO L85 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2021-10-29 05:40:41,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:41,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608564977] [2021-10-29 05:40:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:41,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:41,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:41,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:40:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:40:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:41,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-29 05:40:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:41,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:41,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:40:41,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608564977] [2021-10-29 05:40:41,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608564977] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:41,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:41,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-29 05:40:41,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66308738] [2021-10-29 05:40:41,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:40:41,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:40:41,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:40:41,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:40:41,217 INFO L87 Difference]: Start difference. First operand 178 states and 304 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-10-29 05:40:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:41,478 INFO L93 Difference]: Finished difference Result 262 states and 412 transitions. [2021-10-29 05:40:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:40:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 6 [2021-10-29 05:40:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:41,481 INFO L225 Difference]: With dead ends: 262 [2021-10-29 05:40:41,481 INFO L226 Difference]: Without dead ends: 262 [2021-10-29 05:40:41,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:40:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-29 05:40:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 224. [2021-10-29 05:40:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 208 states have (on average 1.8509615384615385) internal successors, (385), 223 states have internal predecessors, (385), 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) [2021-10-29 05:40:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 385 transitions. [2021-10-29 05:40:41,496 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 385 transitions. Word has length 6 [2021-10-29 05:40:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:41,497 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 385 transitions. [2021-10-29 05:40:41,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-10-29 05:40:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 385 transitions. [2021-10-29 05:40:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:40:41,498 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:41,498 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:41,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:41,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:40:41,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2021-10-29 05:40:41,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:41,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182694037] [2021-10-29 05:40:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:41,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:41,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:41,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:41,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:40:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 05:40:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:41,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:41,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:40:41,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182694037] [2021-10-29 05:40:41,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182694037] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:41,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:41,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-29 05:40:41,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401775564] [2021-10-29 05:40:41,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:40:41,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:40:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:40:41,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:40:41,850 INFO L87 Difference]: Start difference. First operand 224 states and 385 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-29 05:40:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:41,892 INFO L93 Difference]: Finished difference Result 226 states and 319 transitions. [2021-10-29 05:40:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:40:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-10-29 05:40:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:41,895 INFO L225 Difference]: With dead ends: 226 [2021-10-29 05:40:41,895 INFO L226 Difference]: Without dead ends: 226 [2021-10-29 05:40:41,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:40:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-29 05:40:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2021-10-29 05:40:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.7950819672131149) internal successors, (219), 133 states have internal predecessors, (219), 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) [2021-10-29 05:40:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 219 transitions. [2021-10-29 05:40:41,903 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 219 transitions. Word has length 7 [2021-10-29 05:40:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:41,903 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 219 transitions. [2021-10-29 05:40:41,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-29 05:40:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 219 transitions. [2021-10-29 05:40:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:40:41,904 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:41,904 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:41,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:42,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:40:42,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 346576936, now seen corresponding path program 1 times [2021-10-29 05:40:42,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:42,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784279041] [2021-10-29 05:40:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:42,121 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:42,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:42,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:40:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 05:40:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:42,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:42,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:40:42,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784279041] [2021-10-29 05:40:42,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784279041] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:40:42,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:40:42,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-29 05:40:42,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7168892] [2021-10-29 05:40:42,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:40:42,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:40:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:40:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:40:42,273 INFO L87 Difference]: Start difference. First operand 134 states and 219 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-10-29 05:40:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:42,328 INFO L93 Difference]: Finished difference Result 251 states and 398 transitions. [2021-10-29 05:40:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:40:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2021-10-29 05:40:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:42,330 INFO L225 Difference]: With dead ends: 251 [2021-10-29 05:40:42,330 INFO L226 Difference]: Without dead ends: 251 [2021-10-29 05:40:42,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:40:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-29 05:40:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2021-10-29 05:40:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.7349397590361446) internal successors, (288), 177 states have internal predecessors, (288), 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) [2021-10-29 05:40:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 288 transitions. [2021-10-29 05:40:42,339 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 288 transitions. Word has length 8 [2021-10-29 05:40:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:42,340 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 288 transitions. [2021-10-29 05:40:42,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-10-29 05:40:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 288 transitions. [2021-10-29 05:40:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:40:42,341 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:42,341 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:42,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:42,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:40:42,556 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:42,557 INFO L85 PathProgramCache]: Analyzing trace with hash 212840816, now seen corresponding path program 1 times [2021-10-29 05:40:42,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:42,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358705542] [2021-10-29 05:40:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:42,557 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:42,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:42,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:40:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:42,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:40:42,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:42,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:42,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:40:42,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358705542] [2021-10-29 05:40:42,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358705542] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:40:42,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [317677025] [2021-10-29 05:40:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:42,746 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-29 05:40:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/cvc4 [2021-10-29 05:40:42,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-29 05:40:42,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-29 05:40:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:40:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:42,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:42,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [317677025] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:40:42,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13824090] [2021-10-29 05:40:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:42,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:40:42,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:40:42,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:40:43,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-29 05:40:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:40:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:40:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:40:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:43,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:40:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:40:43,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13824090] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:40:43,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-29 05:40:43,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-29 05:40:43,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934163910] [2021-10-29 05:40:43,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 05:40:43,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:40:43,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 05:40:43,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:40:43,189 INFO L87 Difference]: Start difference. First operand 178 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-10-29 05:40:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:40:43,483 INFO L93 Difference]: Finished difference Result 709 states and 1136 transitions. [2021-10-29 05:40:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-29 05:40:43,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 [2021-10-29 05:40:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:40:43,493 INFO L225 Difference]: With dead ends: 709 [2021-10-29 05:40:43,493 INFO L226 Difference]: Without dead ends: 709 [2021-10-29 05:40:43,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-10-29 05:40:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-10-29 05:40:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 388. [2021-10-29 05:40:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 376 states have (on average 1.702127659574468) internal successors, (640), 387 states have internal predecessors, (640), 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) [2021-10-29 05:40:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 640 transitions. [2021-10-29 05:40:43,511 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 640 transitions. Word has length 11 [2021-10-29 05:40:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:40:43,512 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 640 transitions. [2021-10-29 05:40:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-10-29 05:40:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 640 transitions. [2021-10-29 05:40:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:40:43,513 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:40:43,513 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:43,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:43,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:43,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:44,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:40:44,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-10-29 05:40:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:40:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1598757208, now seen corresponding path program 1 times [2021-10-29 05:40:44,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:40:44,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881568981] [2021-10-29 05:40:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:40:44,125 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:40:44,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:40:44,126 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:40:44,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-29 05:40:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:40:44,229 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:40:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:40:44,295 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:40:44,296 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:40:44,297 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:40:44,298 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:40:44,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:40:44,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-29 05:40:44,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:40:44,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:40:44,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:40:44,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-29 05:40:44,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:40:44,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-29 05:40:44,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-29 05:40:44,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-29 05:40:44,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-29 05:40:44,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-29 05:40:44,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-29 05:40:44,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-29 05:40:44,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-29 05:40:44,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:40:44,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:40:44,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:40:44,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-29 05:40:44,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:40:44,505 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:40:44,507 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:40:44,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:40:44 BoogieIcfgContainer [2021-10-29 05:40:44,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:40:44,548 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:40:44,548 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:40:44,548 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:40:44,549 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:40:39" (3/4) ... [2021-10-29 05:40:44,551 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:40:44,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:40:44,553 INFO L168 Benchmark]: Toolchain (without parser) took 6806.91 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 41.6 MB in the beginning and 42.0 MB in the end (delta: -427.8 kB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:44,553 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 44.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:40:44,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 565.21 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 38.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:44,554 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.24 ms. Allocated memory is still 62.9 MB. Free memory was 38.1 MB in the beginning and 35.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:44,554 INFO L168 Benchmark]: Boogie Preprocessor took 33.12 ms. Allocated memory is still 62.9 MB. Free memory was 35.8 MB in the beginning and 34.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:44,555 INFO L168 Benchmark]: RCFGBuilder took 700.05 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 50.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:44,555 INFO L168 Benchmark]: TraceAbstraction took 5429.82 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.9 MB in the beginning and 42.7 MB in the end (delta: 7.3 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:40:44,556 INFO L168 Benchmark]: Witness Printer took 3.50 ms. Allocated memory is still 92.3 MB. Free memory was 42.7 MB in the beginning and 42.0 MB in the end (delta: 647.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:40:44,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 44.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 565.21 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 38.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.24 ms. Allocated memory is still 62.9 MB. Free memory was 38.1 MB in the beginning and 35.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.12 ms. Allocated memory is still 62.9 MB. Free memory was 35.8 MB in the beginning and 34.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 700.05 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 50.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5429.82 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.9 MB in the beginning and 42.7 MB in the end (delta: 7.3 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.50 ms. Allocated memory is still 92.3 MB. Free memory was 42.7 MB in the beginning and 42.0 MB in the end (delta: 647.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 779 SDtfs, 1096 SDslu, 1112 SDs, 0 SdLazy, 303 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=388occurred in iteration=7, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 583 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 332 SizeOfPredicates, 11 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 0/18 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:40:44,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb58b63-2454-4cd8-9055-c635ac4bd429/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...