./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:39:29,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:39:29,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:39:29,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:39:29,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:39:29,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:39:29,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:39:29,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:39:29,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:39:29,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:39:29,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:39:29,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:39:29,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:39:29,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:39:29,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:39:29,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:39:29,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:39:29,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:39:29,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:39:29,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:39:29,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:39:29,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:39:29,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:39:29,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:39:29,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:39:29,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:39:29,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:39:29,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:39:29,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:39:29,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:39:29,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:39:29,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:39:29,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:39:29,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:39:29,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:39:29,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:39:29,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:39:29,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:39:29,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:39:29,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:39:29,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:39:29,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:39:29,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:39:29,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:39:29,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:39:29,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:39:29,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:39:29,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:39:29,449 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:39:29,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:39:29,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:39:29,450 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:39:29,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:39:29,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:39:29,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:39:29,451 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:39:29,451 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:39:29,451 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:39:29,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:39:29,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:39:29,452 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:39:29,452 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:39:29,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:39:29,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:39:29,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:39:29,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:39:29,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:39:29,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:39:29,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:39:29,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:39:29,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:39:29,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-10-21 19:39:29,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:39:29,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:39:29,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:39:29,738 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:39:29,739 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:39:29,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-21 19:39:29,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/ae7953c73/340e3d8734204d788e7e900bbccc8e99/FLAGf196cec1e [2021-10-21 19:39:30,331 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:39:30,331 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-21 19:39:30,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/ae7953c73/340e3d8734204d788e7e900bbccc8e99/FLAGf196cec1e [2021-10-21 19:39:30,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/ae7953c73/340e3d8734204d788e7e900bbccc8e99 [2021-10-21 19:39:30,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:39:30,639 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:39:30,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:39:30,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:39:30,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:39:30,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:39:30" (1/1) ... [2021-10-21 19:39:30,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161b1f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:30, skipping insertion in model container [2021-10-21 19:39:30,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:39:30" (1/1) ... [2021-10-21 19:39:30,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:39:30,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:39:31,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:39:31,079 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:39:31,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:39:31,195 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:39:31,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31 WrapperNode [2021-10-21 19:39:31,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:39:31,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:39:31,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:39:31,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:39:31,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:39:31,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:39:31,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:39:31,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:39:31,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (1/1) ... [2021-10-21 19:39:31,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:39:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:31,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:39:31,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:39:31,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:39:31,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:39:31,403 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:39:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:39:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:39:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:39:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:39:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:39:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-21 19:39:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-21 19:39:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:39:31,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:39:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:39:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:39:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:39:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:39:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:39:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:39:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:39:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:39:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:39:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:39:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:39:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:39:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:39:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:39:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:39:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:39:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:39:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:39:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:39:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:39:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:39:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:39:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:39:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:39:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:39:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:39:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:39:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:39:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:39:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:39:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:39:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:39:31,413 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:39:31,413 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:39:31,413 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:39:31,413 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:39:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:39:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:39:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:39:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:39:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:39:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:39:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:39:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:39:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:39:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:39:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:39:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:39:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:39:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:39:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:39:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:39:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:39:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:39:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:39:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:39:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:39:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:39:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:39:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:39:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:39:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:39:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:39:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:39:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:39:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:39:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:39:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:39:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:39:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:39:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:39:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:39:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:39:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:39:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:39:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:39:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:39:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:39:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:39:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:39:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:39:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:39:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:39:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:39:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:39:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:39:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:39:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:39:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:39:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:39:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:39:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:39:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:39:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:39:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:39:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:39:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:39:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:39:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:39:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:39:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:39:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:39:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:39:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:39:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:39:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:39:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:39:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:39:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:39:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:39:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:39:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:39:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-21 19:39:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:39:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:39:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:39:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-21 19:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:39:32,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:39:32,037 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:39:32,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:39:32 BoogieIcfgContainer [2021-10-21 19:39:32,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:39:32,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:39:32,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:39:32,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:39:32,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:39:30" (1/3) ... [2021-10-21 19:39:32,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d9b686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:39:32, skipping insertion in model container [2021-10-21 19:39:32,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:31" (2/3) ... [2021-10-21 19:39:32,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d9b686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:39:32, skipping insertion in model container [2021-10-21 19:39:32,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:39:32" (3/3) ... [2021-10-21 19:39:32,048 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-21 19:39:32,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:39:32,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-21 19:39:32,096 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:39:32,102 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 [2021-10-21 19:39:32,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-21 19:39:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:39:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:39:32,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:32,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:32,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:32,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-10-21 19:39:32,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:32,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493952640] [2021-10-21 19:39:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:32,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:32,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:32,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493952640] [2021-10-21 19:39:32,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493952640] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:32,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:32,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:39:32,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894909671] [2021-10-21 19:39:32,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:39:32,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:39:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:39:32,511 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:32,802 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-10-21 19:39:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:39:32,803 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-21 19:39:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:32,818 INFO L225 Difference]: With dead ends: 92 [2021-10-21 19:39:32,818 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 19:39:32,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:39:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 19:39:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-21 19:39:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:39:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-10-21 19:39:32,873 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-10-21 19:39:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:32,873 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-10-21 19:39:32,874 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-10-21 19:39:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:39:32,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:32,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:32,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:39:32,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-10-21 19:39:32,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:32,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673099484] [2021-10-21 19:39:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:32,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:33,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:33,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673099484] [2021-10-21 19:39:33,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673099484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:33,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:33,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:39:33,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309385623] [2021-10-21 19:39:33,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:39:33,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:39:33,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:33,112 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:33,408 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-10-21 19:39:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:39:33,409 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:39:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:33,414 INFO L225 Difference]: With dead ends: 91 [2021-10-21 19:39:33,414 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 19:39:33,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:39:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 19:39:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-10-21 19:39:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:39:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-10-21 19:39:33,436 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-10-21 19:39:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:33,437 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-10-21 19:39:33,437 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-10-21 19:39:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:39:33,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:33,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:33,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:39:33,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-10-21 19:39:33,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:33,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962961905] [2021-10-21 19:39:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:33,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:33,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:33,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962961905] [2021-10-21 19:39:33,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962961905] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:33,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:33,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:39:33,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531284749] [2021-10-21 19:39:33,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:39:33,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:39:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:33,656 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:34,000 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-10-21 19:39:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:39:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:39:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:34,004 INFO L225 Difference]: With dead ends: 135 [2021-10-21 19:39:34,004 INFO L226 Difference]: Without dead ends: 135 [2021-10-21 19:39:34,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:39:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-21 19:39:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-10-21 19:39:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:39:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-10-21 19:39:34,015 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-10-21 19:39:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:34,015 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-10-21 19:39:34,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-10-21 19:39:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:39:34,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:34,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:34,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:39:34,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-10-21 19:39:34,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:34,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875115826] [2021-10-21 19:39:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:34,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:34,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:34,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875115826] [2021-10-21 19:39:34,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875115826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:34,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:34,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:39:34,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824419110] [2021-10-21 19:39:34,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:39:34,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:39:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:34,117 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:34,327 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-10-21 19:39:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:39:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:39:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:34,330 INFO L225 Difference]: With dead ends: 149 [2021-10-21 19:39:34,330 INFO L226 Difference]: Without dead ends: 144 [2021-10-21 19:39:34,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-21 19:39:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-10-21 19:39:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:39:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-10-21 19:39:34,344 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-10-21 19:39:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:34,345 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-10-21 19:39:34,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-10-21 19:39:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:39:34,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:34,346 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:34,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:39:34,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-10-21 19:39:34,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:34,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785434374] [2021-10-21 19:39:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:34,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:34,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:34,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785434374] [2021-10-21 19:39:34,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785434374] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:34,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:34,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:39:34,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971692132] [2021-10-21 19:39:34,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:39:34,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:39:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:39:34,475 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:34,873 INFO L93 Difference]: Finished difference Result 197 states and 286 transitions. [2021-10-21 19:39:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:39:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:39:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:34,877 INFO L225 Difference]: With dead ends: 197 [2021-10-21 19:39:34,877 INFO L226 Difference]: Without dead ends: 197 [2021-10-21 19:39:34,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:39:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-21 19:39:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-10-21 19:39:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 125 states have (on average 1.752) internal successors, (219), 151 states have internal predecessors, (219), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (20), 7 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-21 19:39:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-10-21 19:39:34,905 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 13 [2021-10-21 19:39:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:34,912 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-10-21 19:39:34,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-10-21 19:39:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:39:34,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:34,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:34,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:39:34,914 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-10-21 19:39:34,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:34,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431376298] [2021-10-21 19:39:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:34,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:35,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:35,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431376298] [2021-10-21 19:39:35,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431376298] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:35,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:35,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:39:35,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124029810] [2021-10-21 19:39:35,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:39:35,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:39:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:35,033 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:35,362 INFO L93 Difference]: Finished difference Result 260 states and 393 transitions. [2021-10-21 19:39:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:39:35,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:39:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:35,369 INFO L225 Difference]: With dead ends: 260 [2021-10-21 19:39:35,370 INFO L226 Difference]: Without dead ends: 260 [2021-10-21 19:39:35,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:39:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-21 19:39:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 233. [2021-10-21 19:39:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.7258064516129032) internal successors, (321), 212 states have internal predecessors, (321), 16 states have call successors, (16), 12 states have call predecessors, (16), 13 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-10-21 19:39:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 366 transitions. [2021-10-21 19:39:35,400 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 366 transitions. Word has length 13 [2021-10-21 19:39:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:35,400 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 366 transitions. [2021-10-21 19:39:35,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 366 transitions. [2021-10-21 19:39:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:39:35,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:35,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:35,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:39:35,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-10-21 19:39:35,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:35,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629022736] [2021-10-21 19:39:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:35,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:35,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:35,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629022736] [2021-10-21 19:39:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629022736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:35,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:35,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:39:35,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986264306] [2021-10-21 19:39:35,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:39:35,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:39:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:35,523 INFO L87 Difference]: Start difference. First operand 233 states and 366 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:35,867 INFO L93 Difference]: Finished difference Result 311 states and 476 transitions. [2021-10-21 19:39:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:39:35,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:39:35,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:35,870 INFO L225 Difference]: With dead ends: 311 [2021-10-21 19:39:35,870 INFO L226 Difference]: Without dead ends: 311 [2021-10-21 19:39:35,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:39:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-21 19:39:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-10-21 19:39:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 238 states have (on average 1.7016806722689075) internal successors, (405), 262 states have internal predecessors, (405), 16 states have call successors, (16), 16 states have call predecessors, (16), 17 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-10-21 19:39:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 450 transitions. [2021-10-21 19:39:35,889 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 450 transitions. Word has length 13 [2021-10-21 19:39:35,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:35,889 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 450 transitions. [2021-10-21 19:39:35,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 450 transitions. [2021-10-21 19:39:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:39:35,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:35,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:35,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:39:35,891 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-10-21 19:39:35,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:35,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048201946] [2021-10-21 19:39:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:35,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:35,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:35,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048201946] [2021-10-21 19:39:35,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048201946] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:35,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:35,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:39:35,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652625865] [2021-10-21 19:39:35,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:39:35,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:39:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:39:35,986 INFO L87 Difference]: Start difference. First operand 287 states and 450 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:36,210 INFO L93 Difference]: Finished difference Result 275 states and 400 transitions. [2021-10-21 19:39:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:39:36,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-21 19:39:36,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:36,213 INFO L225 Difference]: With dead ends: 275 [2021-10-21 19:39:36,214 INFO L226 Difference]: Without dead ends: 275 [2021-10-21 19:39:36,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:39:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-21 19:39:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2021-10-21 19:39:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 197 states have (on average 1.649746192893401) internal successors, (325), 215 states have internal predecessors, (325), 14 states have call successors, (14), 14 states have call predecessors, (14), 15 states have return successors, (23), 9 states have call predecessors, (23), 13 states have call successors, (23) [2021-10-21 19:39:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 362 transitions. [2021-10-21 19:39:36,233 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 362 transitions. Word has length 14 [2021-10-21 19:39:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:36,233 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 362 transitions. [2021-10-21 19:39:36,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 362 transitions. [2021-10-21 19:39:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:39:36,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:36,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:36,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:39:36,235 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:36,235 INFO L82 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-10-21 19:39:36,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:36,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941715408] [2021-10-21 19:39:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:36,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:36,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:36,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941715408] [2021-10-21 19:39:36,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941715408] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:36,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:36,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:39:36,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893619851] [2021-10-21 19:39:36,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:39:36,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:39:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:39:36,331 INFO L87 Difference]: Start difference. First operand 238 states and 362 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:36,575 INFO L93 Difference]: Finished difference Result 439 states and 619 transitions. [2021-10-21 19:39:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:39:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:39:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:36,580 INFO L225 Difference]: With dead ends: 439 [2021-10-21 19:39:36,580 INFO L226 Difference]: Without dead ends: 439 [2021-10-21 19:39:36,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:39:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-21 19:39:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 409. [2021-10-21 19:39:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 334 states have (on average 1.5089820359281436) internal successors, (504), 366 states have internal predecessors, (504), 26 states have call successors, (26), 26 states have call predecessors, (26), 37 states have return successors, (55), 17 states have call predecessors, (55), 25 states have call successors, (55) [2021-10-21 19:39:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 585 transitions. [2021-10-21 19:39:36,613 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 585 transitions. Word has length 15 [2021-10-21 19:39:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:36,614 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 585 transitions. [2021-10-21 19:39:36,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 585 transitions. [2021-10-21 19:39:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:39:36,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:36,620 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:36,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:39:36,620 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-10-21 19:39:36,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:36,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003082543] [2021-10-21 19:39:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:36,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:36,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:36,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003082543] [2021-10-21 19:39:36,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003082543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:36,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385428476] [2021-10-21 19:39:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:36,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:36,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:36,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:36,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:39:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:39:36,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385428476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:37,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:37,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-21 19:39:37,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019203571] [2021-10-21 19:39:37,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:39:37,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:39:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:39:37,116 INFO L87 Difference]: Start difference. First operand 409 states and 585 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:39:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:38,063 INFO L93 Difference]: Finished difference Result 491 states and 695 transitions. [2021-10-21 19:39:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:39:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-10-21 19:39:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:38,070 INFO L225 Difference]: With dead ends: 491 [2021-10-21 19:39:38,070 INFO L226 Difference]: Without dead ends: 491 [2021-10-21 19:39:38,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:39:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-21 19:39:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 425. [2021-10-21 19:39:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 340 states have (on average 1.4764705882352942) internal successors, (502), 382 states have internal predecessors, (502), 26 states have call successors, (26), 26 states have call predecessors, (26), 47 states have return successors, (65), 17 states have call predecessors, (65), 25 states have call successors, (65) [2021-10-21 19:39:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 593 transitions. [2021-10-21 19:39:38,101 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 593 transitions. Word has length 22 [2021-10-21 19:39:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:38,101 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 593 transitions. [2021-10-21 19:39:38,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:39:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 593 transitions. [2021-10-21 19:39:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:39:38,104 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:38,104 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:38,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:38,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:39:38,318 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2086418946, now seen corresponding path program 1 times [2021-10-21 19:39:38,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:38,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668066967] [2021-10-21 19:39:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:38,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:38,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:38,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668066967] [2021-10-21 19:39:38,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668066967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:38,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876077888] [2021-10-21 19:39:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:38,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:38,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:38,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:38,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:39:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:39:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:38,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876077888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:38,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:38,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-21 19:39:38,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510430773] [2021-10-21 19:39:38,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:39:38,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:39:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:39:38,894 INFO L87 Difference]: Start difference. First operand 425 states and 593 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:39:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:39,749 INFO L93 Difference]: Finished difference Result 739 states and 1008 transitions. [2021-10-21 19:39:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:39:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-10-21 19:39:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:39,755 INFO L225 Difference]: With dead ends: 739 [2021-10-21 19:39:39,755 INFO L226 Difference]: Without dead ends: 739 [2021-10-21 19:39:39,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:39:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-10-21 19:39:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 642. [2021-10-21 19:39:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 507 states have (on average 1.4260355029585798) internal successors, (723), 579 states have internal predecessors, (723), 38 states have call successors, (38), 38 states have call predecessors, (38), 85 states have return successors, (113), 25 states have call predecessors, (113), 37 states have call successors, (113) [2021-10-21 19:39:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 874 transitions. [2021-10-21 19:39:39,788 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 874 transitions. Word has length 24 [2021-10-21 19:39:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:39,788 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 874 transitions. [2021-10-21 19:39:39,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:39:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 874 transitions. [2021-10-21 19:39:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:39:39,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:39,790 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:39,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:40,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:39:40,006 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash -495871717, now seen corresponding path program 1 times [2021-10-21 19:39:40,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:40,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029688750] [2021-10-21 19:39:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:40,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:40,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:40,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:39:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:40,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:40,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029688750] [2021-10-21 19:39:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029688750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:40,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996309805] [2021-10-21 19:39:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:40,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:40,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:40,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:39:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:40,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:39:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996309805] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:40,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:40,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-10-21 19:39:40,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274505361] [2021-10-21 19:39:40,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:39:40,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:39:40,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:39:40,670 INFO L87 Difference]: Start difference. First operand 642 states and 874 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:39:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:42,197 INFO L93 Difference]: Finished difference Result 2361 states and 3365 transitions. [2021-10-21 19:39:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:39:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2021-10-21 19:39:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:42,214 INFO L225 Difference]: With dead ends: 2361 [2021-10-21 19:39:42,214 INFO L226 Difference]: Without dead ends: 2361 [2021-10-21 19:39:42,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 914.1ms TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:39:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-10-21 19:39:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2015. [2021-10-21 19:39:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 1621 states have (on average 1.4090067859346083) internal successors, (2284), 1816 states have internal predecessors, (2284), 123 states have call successors, (123), 123 states have call predecessors, (123), 259 states have return successors, (388), 76 states have call predecessors, (388), 122 states have call successors, (388) [2021-10-21 19:39:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2795 transitions. [2021-10-21 19:39:42,312 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2795 transitions. Word has length 35 [2021-10-21 19:39:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:42,312 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2795 transitions. [2021-10-21 19:39:42,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:39:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2795 transitions. [2021-10-21 19:39:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:39:42,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:42,314 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:42,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:42,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:39:42,530 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-10-21 19:39:42,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:42,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395592440] [2021-10-21 19:39:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:42,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:42,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:42,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:42,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:39:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:42,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:42,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395592440] [2021-10-21 19:39:42,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395592440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:42,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194704279] [2021-10-21 19:39:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:42,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:42,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:42,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:39:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:42,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:39:42,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:43,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194704279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:43,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:43,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-21 19:39:43,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136992366] [2021-10-21 19:39:43,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:39:43,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:39:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:39:43,167 INFO L87 Difference]: Start difference. First operand 2015 states and 2795 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:39:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:44,114 INFO L93 Difference]: Finished difference Result 2783 states and 4061 transitions. [2021-10-21 19:39:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:39:44,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-10-21 19:39:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:44,134 INFO L225 Difference]: With dead ends: 2783 [2021-10-21 19:39:44,134 INFO L226 Difference]: Without dead ends: 2783 [2021-10-21 19:39:44,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 472.9ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:39:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-10-21 19:39:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2472. [2021-10-21 19:39:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 1977 states have (on average 1.4011127971674253) internal successors, (2770), 2227 states have internal predecessors, (2770), 169 states have call successors, (169), 146 states have call predecessors, (169), 314 states have return successors, (533), 99 states have call predecessors, (533), 168 states have call successors, (533) [2021-10-21 19:39:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3472 transitions. [2021-10-21 19:39:44,256 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3472 transitions. Word has length 36 [2021-10-21 19:39:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:44,256 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 3472 transitions. [2021-10-21 19:39:44,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:39:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3472 transitions. [2021-10-21 19:39:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:39:44,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:44,259 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:44,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:44,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:44,474 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:44,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1744987825, now seen corresponding path program 1 times [2021-10-21 19:39:44,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:44,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907120945] [2021-10-21 19:39:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:44,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:44,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:44,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:39:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:44,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:44,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907120945] [2021-10-21 19:39:44,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907120945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:44,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547431544] [2021-10-21 19:39:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:44,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:44,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:44,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:39:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:39:44,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547431544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:45,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:45,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-10-21 19:39:45,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329106360] [2021-10-21 19:39:45,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:39:45,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:39:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:39:45,224 INFO L87 Difference]: Start difference. First operand 2472 states and 3472 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:39:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:46,262 INFO L93 Difference]: Finished difference Result 2236 states and 3085 transitions. [2021-10-21 19:39:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:39:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-10-21 19:39:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:46,276 INFO L225 Difference]: With dead ends: 2236 [2021-10-21 19:39:46,277 INFO L226 Difference]: Without dead ends: 2120 [2021-10-21 19:39:46,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 678.0ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:39:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-10-21 19:39:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1825. [2021-10-21 19:39:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1447 states have (on average 1.38217000691085) internal successors, (2000), 1634 states have internal predecessors, (2000), 142 states have call successors, (142), 119 states have call predecessors, (142), 224 states have return successors, (364), 72 states have call predecessors, (364), 141 states have call successors, (364) [2021-10-21 19:39:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2506 transitions. [2021-10-21 19:39:46,367 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2506 transitions. Word has length 38 [2021-10-21 19:39:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2506 transitions. [2021-10-21 19:39:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:39:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2506 transitions. [2021-10-21 19:39:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:39:46,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:46,370 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:46,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:46,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:46,594 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-10-21 19:39:46,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:46,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830560705] [2021-10-21 19:39:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:46,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:46,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:46,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:46,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:39:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:46,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:39:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:39:46,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:46,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830560705] [2021-10-21 19:39:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830560705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:46,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353626124] [2021-10-21 19:39:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:46,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:46,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:46,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:46,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:39:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:39:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:39:47,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353626124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:47,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:47,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-21 19:39:47,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834101368] [2021-10-21 19:39:47,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:39:47,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:39:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:39:47,324 INFO L87 Difference]: Start difference. First operand 1825 states and 2506 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:39:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:48,588 INFO L93 Difference]: Finished difference Result 3248 states and 4600 transitions. [2021-10-21 19:39:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:39:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-10-21 19:39:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:48,616 INFO L225 Difference]: With dead ends: 3248 [2021-10-21 19:39:48,616 INFO L226 Difference]: Without dead ends: 3248 [2021-10-21 19:39:48,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:39:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-10-21 19:39:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2632. [2021-10-21 19:39:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2104 states have (on average 1.3935361216730038) internal successors, (2932), 2372 states have internal predecessors, (2932), 188 states have call successors, (188), 165 states have call predecessors, (188), 328 states have return successors, (488), 95 states have call predecessors, (488), 187 states have call successors, (488) [2021-10-21 19:39:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3608 transitions. [2021-10-21 19:39:48,738 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3608 transitions. Word has length 47 [2021-10-21 19:39:48,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:48,738 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 3608 transitions. [2021-10-21 19:39:48,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:39:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3608 transitions. [2021-10-21 19:39:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:39:48,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:48,741 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:48,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:48,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:39:48,955 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:48,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-10-21 19:39:48,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:48,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664718642] [2021-10-21 19:39:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:48,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:49,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:49,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:49,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:39:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:49,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:39:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:49,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:39:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:39:49,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664718642] [2021-10-21 19:39:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664718642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760117709] [2021-10-21 19:39:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:49,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:49,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:49,210 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:49,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:39:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:49,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:39:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:39:49,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760117709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:49,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:49,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-10-21 19:39:49,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618927817] [2021-10-21 19:39:49,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:39:49,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:39:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:39:49,719 INFO L87 Difference]: Start difference. First operand 2632 states and 3608 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:39:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:50,396 INFO L93 Difference]: Finished difference Result 3687 states and 5274 transitions. [2021-10-21 19:39:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:39:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-10-21 19:39:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:50,421 INFO L225 Difference]: With dead ends: 3687 [2021-10-21 19:39:50,421 INFO L226 Difference]: Without dead ends: 3687 [2021-10-21 19:39:50,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:39:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-10-21 19:39:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2678. [2021-10-21 19:39:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2127 states have (on average 1.3892806770098731) internal successors, (2955), 2418 states have internal predecessors, (2955), 188 states have call successors, (188), 165 states have call predecessors, (188), 351 states have return successors, (534), 95 states have call predecessors, (534), 187 states have call successors, (534) [2021-10-21 19:39:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3677 transitions. [2021-10-21 19:39:50,566 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3677 transitions. Word has length 58 [2021-10-21 19:39:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:50,567 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3677 transitions. [2021-10-21 19:39:50,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:39:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3677 transitions. [2021-10-21 19:39:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:39:50,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:50,570 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:50,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:50,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:39:50,790 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:39:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-10-21 19:39:50,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:50,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541991122] [2021-10-21 19:39:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:50,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:50,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:39:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:50,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:39:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:51,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:39:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:51,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-21 19:39:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:39:51,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:51,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541991122] [2021-10-21 19:39:51,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541991122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:51,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718882120] [2021-10-21 19:39:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:51,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:51,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:51,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:39:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:51,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:39:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:39:51,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718882120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:51,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:51,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-21 19:39:51,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065229956] [2021-10-21 19:39:51,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:39:51,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:39:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:39:51,652 INFO L87 Difference]: Start difference. First operand 2678 states and 3677 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-21 19:40:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:00,511 INFO L93 Difference]: Finished difference Result 10210 states and 14276 transitions. [2021-10-21 19:40:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-10-21 19:40:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2021-10-21 19:40:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:00,591 INFO L225 Difference]: With dead ends: 10210 [2021-10-21 19:40:00,591 INFO L226 Difference]: Without dead ends: 10035 [2021-10-21 19:40:00,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 5708.6ms TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-10-21 19:40:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2021-10-21 19:40:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 8947. [2021-10-21 19:40:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8947 states, 7143 states have (on average 1.360212795744085) internal successors, (9716), 8037 states have internal predecessors, (9716), 670 states have call successors, (670), 573 states have call predecessors, (670), 1123 states have return successors, (2034), 337 states have call predecessors, (2034), 669 states have call successors, (2034) [2021-10-21 19:40:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8947 states to 8947 states and 12420 transitions. [2021-10-21 19:40:01,096 INFO L78 Accepts]: Start accepts. Automaton has 8947 states and 12420 transitions. Word has length 60 [2021-10-21 19:40:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:01,097 INFO L470 AbstractCegarLoop]: Abstraction has 8947 states and 12420 transitions. [2021-10-21 19:40:01,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-21 19:40:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 8947 states and 12420 transitions. [2021-10-21 19:40:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:40:01,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:01,115 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:01,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:01,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:40:01,318 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:01,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-10-21 19:40:01,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:01,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788536506] [2021-10-21 19:40:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:01,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-21 19:40:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:40:01,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:01,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788536506] [2021-10-21 19:40:01,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788536506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:01,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975417209] [2021-10-21 19:40:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:01,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:01,553 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:01,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:40:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:40:01,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:40:02,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975417209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:02,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:02,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-10-21 19:40:02,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939573618] [2021-10-21 19:40:02,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:40:02,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:02,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:40:02,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:40:02,139 INFO L87 Difference]: Start difference. First operand 8947 states and 12420 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-21 19:40:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:04,102 INFO L93 Difference]: Finished difference Result 18386 states and 26465 transitions. [2021-10-21 19:40:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 19:40:04,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2021-10-21 19:40:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:04,204 INFO L225 Difference]: With dead ends: 18386 [2021-10-21 19:40:04,205 INFO L226 Difference]: Without dead ends: 18386 [2021-10-21 19:40:04,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1112.6ms TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 19:40:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18386 states. [2021-10-21 19:40:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18386 to 14298. [2021-10-21 19:40:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14298 states, 11614 states have (on average 1.3810056827966248) internal successors, (16039), 12898 states have internal predecessors, (16039), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1671 states have return successors, (3048), 503 states have call predecessors, (3048), 1001 states have call successors, (3048) [2021-10-21 19:40:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14298 states to 14298 states and 20089 transitions. [2021-10-21 19:40:04,862 INFO L78 Accepts]: Start accepts. Automaton has 14298 states and 20089 transitions. Word has length 60 [2021-10-21 19:40:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:04,863 INFO L470 AbstractCegarLoop]: Abstraction has 14298 states and 20089 transitions. [2021-10-21 19:40:04,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-21 19:40:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 14298 states and 20089 transitions. [2021-10-21 19:40:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-21 19:40:04,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:04,868 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:04,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:05,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:40:05,082 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:05,082 INFO L82 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-10-21 19:40:05,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:05,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490012882] [2021-10-21 19:40:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:05,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:40:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-21 19:40:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 19:40:05,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:05,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490012882] [2021-10-21 19:40:05,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490012882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:05,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422921790] [2021-10-21 19:40:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:05,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:05,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:05,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:05,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:40:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:40:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-21 19:40:06,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422921790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:06,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:06,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-10-21 19:40:06,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351842384] [2021-10-21 19:40:06,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:40:06,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:40:06,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:40:06,027 INFO L87 Difference]: Start difference. First operand 14298 states and 20089 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:40:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:07,919 INFO L93 Difference]: Finished difference Result 18457 states and 26048 transitions. [2021-10-21 19:40:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:40:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 71 [2021-10-21 19:40:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:07,988 INFO L225 Difference]: With dead ends: 18457 [2021-10-21 19:40:07,989 INFO L226 Difference]: Without dead ends: 18282 [2021-10-21 19:40:07,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1130.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:40:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2021-10-21 19:40:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 17261. [2021-10-21 19:40:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-10-21 19:40:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-21 19:40:08,505 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 71 [2021-10-21 19:40:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:08,505 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-21 19:40:08,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:40:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-21 19:40:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:40:08,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:08,511 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:08,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:08,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:08,726 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-10-21 19:40:08,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:08,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008156425] [2021-10-21 19:40:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:08,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:40:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-10-21 19:40:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-10-21 19:40:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-21 19:40:08,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:08,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008156425] [2021-10-21 19:40:08,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008156425] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:08,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870304097] [2021-10-21 19:40:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:08,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:08,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:08,955 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:08,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:40:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:40:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 19:40:09,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870304097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:09,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:09,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-10-21 19:40:09,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993750427] [2021-10-21 19:40:09,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:40:09,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:09,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:40:09,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:40:09,766 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:40:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:10,749 INFO L93 Difference]: Finished difference Result 22712 states and 32588 transitions. [2021-10-21 19:40:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:40:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-10-21 19:40:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:10,909 INFO L225 Difference]: With dead ends: 22712 [2021-10-21 19:40:10,909 INFO L226 Difference]: Without dead ends: 22712 [2021-10-21 19:40:10,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:40:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2021-10-21 19:40:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 17261. [2021-10-21 19:40:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-10-21 19:40:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-21 19:40:11,472 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 82 [2021-10-21 19:40:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:11,473 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-21 19:40:11,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:40:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-21 19:40:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:40:11,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:11,484 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:11,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:11,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:11,710 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-10-21 19:40:11,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:11,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619740596] [2021-10-21 19:40:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:11,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-21 19:40:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-21 19:40:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-10-21 19:40:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 19:40:11,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:11,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619740596] [2021-10-21 19:40:11,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619740596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:11,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856893479] [2021-10-21 19:40:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:11,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:11,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:11,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:11,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:40:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:40:12,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 19:40:12,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856893479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:12,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:12,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-21 19:40:12,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829893852] [2021-10-21 19:40:12,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:40:12,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:40:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:40:12,805 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:40:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:15,869 INFO L93 Difference]: Finished difference Result 27778 states and 39484 transitions. [2021-10-21 19:40:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-21 19:40:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 84 [2021-10-21 19:40:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:15,976 INFO L225 Difference]: With dead ends: 27778 [2021-10-21 19:40:15,977 INFO L226 Difference]: Without dead ends: 26524 [2021-10-21 19:40:15,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2080.0ms TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 19:40:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2021-10-21 19:40:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17896. [2021-10-21 19:40:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17896 states, 14358 states have (on average 1.3469146120629614) internal successors, (19339), 16087 states have internal predecessors, (19339), 1334 states have call successors, (1334), 1140 states have call predecessors, (1334), 2193 states have return successors, (4311), 669 states have call predecessors, (4311), 1333 states have call successors, (4311) [2021-10-21 19:40:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17896 states to 17896 states and 24984 transitions. [2021-10-21 19:40:16,712 INFO L78 Accepts]: Start accepts. Automaton has 17896 states and 24984 transitions. Word has length 84 [2021-10-21 19:40:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:16,713 INFO L470 AbstractCegarLoop]: Abstraction has 17896 states and 24984 transitions. [2021-10-21 19:40:16,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:40:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 17896 states and 24984 transitions. [2021-10-21 19:40:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:40:16,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:16,718 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:16,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:16,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:40:16,934 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-10-21 19:40:16,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:16,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231366913] [2021-10-21 19:40:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:16,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:40:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-21 19:40:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-21 19:40:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-21 19:40:17,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:17,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231366913] [2021-10-21 19:40:17,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231366913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:17,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425498245] [2021-10-21 19:40:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:17,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:17,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:17,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:17,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:40:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:40:17,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-21 19:40:17,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425498245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:17,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:17,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-21 19:40:17,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545967294] [2021-10-21 19:40:17,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:40:17,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:40:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:40:17,952 INFO L87 Difference]: Start difference. First operand 17896 states and 24984 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:40:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:19,757 INFO L93 Difference]: Finished difference Result 14807 states and 19651 transitions. [2021-10-21 19:40:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 19:40:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 84 [2021-10-21 19:40:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:19,807 INFO L225 Difference]: With dead ends: 14807 [2021-10-21 19:40:19,807 INFO L226 Difference]: Without dead ends: 13835 [2021-10-21 19:40:19,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1100.7ms TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:40:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2021-10-21 19:40:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 13300. [2021-10-21 19:40:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13300 states, 10710 states have (on average 1.3072829131652661) internal successors, (14001), 11900 states have internal predecessors, (14001), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1577 states have return successors, (2716), 503 states have call predecessors, (2716), 1001 states have call successors, (2716) [2021-10-21 19:40:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13300 states to 13300 states and 17719 transitions. [2021-10-21 19:40:20,158 INFO L78 Accepts]: Start accepts. Automaton has 13300 states and 17719 transitions. Word has length 84 [2021-10-21 19:40:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:20,158 INFO L470 AbstractCegarLoop]: Abstraction has 13300 states and 17719 transitions. [2021-10-21 19:40:20,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:40:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 13300 states and 17719 transitions. [2021-10-21 19:40:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-21 19:40:20,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:20,162 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:20,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:20,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:20,378 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-10-21 19:40:20,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:20,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857887759] [2021-10-21 19:40:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:20,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:40:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:40:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-21 19:40:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 38 proven. 67 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-21 19:40:20,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:20,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857887759] [2021-10-21 19:40:20,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857887759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:20,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404987721] [2021-10-21 19:40:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:20,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:20,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:20,664 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:20,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:40:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:40:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 65 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-21 19:40:21,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404987721] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:21,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:21,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-10-21 19:40:21,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313898406] [2021-10-21 19:40:21,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:40:21,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:40:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:40:21,532 INFO L87 Difference]: Start difference. First operand 13300 states and 17719 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:40:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:22,401 INFO L93 Difference]: Finished difference Result 13075 states and 17272 transitions. [2021-10-21 19:40:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:40:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 85 [2021-10-21 19:40:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:22,439 INFO L225 Difference]: With dead ends: 13075 [2021-10-21 19:40:22,439 INFO L226 Difference]: Without dead ends: 13075 [2021-10-21 19:40:22,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:40:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13075 states. [2021-10-21 19:40:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13075 to 12880. [2021-10-21 19:40:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12880 states, 10360 states have (on average 1.2998069498069498) internal successors, (13466), 11514 states have internal predecessors, (13466), 978 states have call successors, (978), 875 states have call predecessors, (978), 1531 states have return successors, (2628), 491 states have call predecessors, (2628), 977 states have call successors, (2628) [2021-10-21 19:40:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12880 states to 12880 states and 17072 transitions. [2021-10-21 19:40:22,737 INFO L78 Accepts]: Start accepts. Automaton has 12880 states and 17072 transitions. Word has length 85 [2021-10-21 19:40:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:22,738 INFO L470 AbstractCegarLoop]: Abstraction has 12880 states and 17072 transitions. [2021-10-21 19:40:22,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:40:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12880 states and 17072 transitions. [2021-10-21 19:40:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:40:22,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:22,742 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:22,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:22,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:40:22,960 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1378069754, now seen corresponding path program 1 times [2021-10-21 19:40:22,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:22,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066186351] [2021-10-21 19:40:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:22,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:40:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:40:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-10-21 19:40:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-21 19:40:23,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:23,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066186351] [2021-10-21 19:40:23,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066186351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:23,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855747702] [2021-10-21 19:40:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:23,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:23,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:23,230 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:23,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:40:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:40:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:40:24,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855747702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:24,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:24,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-10-21 19:40:24,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35264203] [2021-10-21 19:40:24,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:40:24,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:40:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:40:24,272 INFO L87 Difference]: Start difference. First operand 12880 states and 17072 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 19:40:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:25,738 INFO L93 Difference]: Finished difference Result 20786 states and 27151 transitions. [2021-10-21 19:40:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:40:25,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-10-21 19:40:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:25,802 INFO L225 Difference]: With dead ends: 20786 [2021-10-21 19:40:25,802 INFO L226 Difference]: Without dead ends: 19891 [2021-10-21 19:40:25,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 801.1ms TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:40:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19891 states. [2021-10-21 19:40:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19891 to 18204. [2021-10-21 19:40:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18204 states, 14593 states have (on average 1.2843829233193997) internal successors, (18743), 16269 states have internal predecessors, (18743), 1404 states have call successors, (1404), 1214 states have call predecessors, (1404), 2196 states have return successors, (3836), 721 states have call predecessors, (3836), 1403 states have call successors, (3836) [2021-10-21 19:40:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18204 states to 18204 states and 23983 transitions. [2021-10-21 19:40:26,298 INFO L78 Accepts]: Start accepts. Automaton has 18204 states and 23983 transitions. Word has length 86 [2021-10-21 19:40:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:26,299 INFO L470 AbstractCegarLoop]: Abstraction has 18204 states and 23983 transitions. [2021-10-21 19:40:26,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 19:40:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 18204 states and 23983 transitions. [2021-10-21 19:40:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-21 19:40:26,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:26,303 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:26,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:26,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:40:26,518 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash -616739140, now seen corresponding path program 1 times [2021-10-21 19:40:26,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:26,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314346271] [2021-10-21 19:40:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:26,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-21 19:40:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-10-21 19:40:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-21 19:40:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 70 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-21 19:40:26,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:26,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314346271] [2021-10-21 19:40:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314346271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:26,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91778974] [2021-10-21 19:40:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:26,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:26,803 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:26,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:40:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:27,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:40:27,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 108 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-21 19:40:27,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91778974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:27,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:27,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-21 19:40:27,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041235056] [2021-10-21 19:40:27,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:40:27,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:40:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:40:27,746 INFO L87 Difference]: Start difference. First operand 18204 states and 23983 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:40:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:30,047 INFO L93 Difference]: Finished difference Result 13417 states and 17122 transitions. [2021-10-21 19:40:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-21 19:40:30,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-10-21 19:40:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:30,082 INFO L225 Difference]: With dead ends: 13417 [2021-10-21 19:40:30,082 INFO L226 Difference]: Without dead ends: 12804 [2021-10-21 19:40:30,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1328.2ms TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:40:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12804 states. [2021-10-21 19:40:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12804 to 12620. [2021-10-21 19:40:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12620 states, 10074 states have (on average 1.2790351399642645) internal successors, (12885), 11210 states have internal predecessors, (12885), 988 states have call successors, (988), 899 states have call predecessors, (988), 1547 states have return successors, (2458), 511 states have call predecessors, (2458), 987 states have call successors, (2458) [2021-10-21 19:40:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12620 states to 12620 states and 16331 transitions. [2021-10-21 19:40:30,481 INFO L78 Accepts]: Start accepts. Automaton has 12620 states and 16331 transitions. Word has length 92 [2021-10-21 19:40:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:30,482 INFO L470 AbstractCegarLoop]: Abstraction has 12620 states and 16331 transitions. [2021-10-21 19:40:30,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:40:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12620 states and 16331 transitions. [2021-10-21 19:40:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 19:40:30,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:30,485 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:30,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:30,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:30,710 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:30,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:30,711 INFO L82 PathProgramCache]: Analyzing trace with hash 259058990, now seen corresponding path program 1 times [2021-10-21 19:40:30,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:30,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782875754] [2021-10-21 19:40:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:30,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:30,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:30,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:30,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:30,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:30,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:40:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:30,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:40:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-21 19:40:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-21 19:40:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 80 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-21 19:40:31,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:31,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782875754] [2021-10-21 19:40:31,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782875754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:31,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892089515] [2021-10-21 19:40:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:31,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:31,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:31,062 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:31,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:40:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:31,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-21 19:40:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 108 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-21 19:40:32,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892089515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:32,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:32,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-10-21 19:40:32,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032390061] [2021-10-21 19:40:32,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:40:32,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:40:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:40:32,388 INFO L87 Difference]: Start difference. First operand 12620 states and 16331 transitions. Second operand has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-21 19:40:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:38,438 INFO L93 Difference]: Finished difference Result 21726 states and 27863 transitions. [2021-10-21 19:40:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-21 19:40:38,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 95 [2021-10-21 19:40:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:38,494 INFO L225 Difference]: With dead ends: 21726 [2021-10-21 19:40:38,494 INFO L226 Difference]: Without dead ends: 21592 [2021-10-21 19:40:38,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4022.1ms TimeCoverageRelationStatistics Valid=1246, Invalid=5726, Unknown=0, NotChecked=0, Total=6972 [2021-10-21 19:40:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21592 states. [2021-10-21 19:40:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21592 to 20891. [2021-10-21 19:40:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20891 states, 16726 states have (on average 1.2621068994380007) internal successors, (21110), 18565 states have internal predecessors, (21110), 1608 states have call successors, (1608), 1485 states have call predecessors, (1608), 2546 states have return successors, (4151), 841 states have call predecessors, (4151), 1607 states have call successors, (4151) [2021-10-21 19:40:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20891 states to 20891 states and 26869 transitions. [2021-10-21 19:40:38,891 INFO L78 Accepts]: Start accepts. Automaton has 20891 states and 26869 transitions. Word has length 95 [2021-10-21 19:40:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 20891 states and 26869 transitions. [2021-10-21 19:40:38,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-21 19:40:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 20891 states and 26869 transitions. [2021-10-21 19:40:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-21 19:40:38,898 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:38,898 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 8, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:38,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:39,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:39,122 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 756702157, now seen corresponding path program 1 times [2021-10-21 19:40:39,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:39,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195947455] [2021-10-21 19:40:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:39,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:40:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:40:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:40:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:40:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:40:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-21 19:40:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-21 19:40:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-10-21 19:40:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-10-21 19:40:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-10-21 19:40:39,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:39,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195947455] [2021-10-21 19:40:39,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195947455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:39,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80545321] [2021-10-21 19:40:39,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:39,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:39,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:39,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:39,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:40:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:40:39,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 91 proven. 62 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-10-21 19:40:40,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80545321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:40,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:40,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-21 19:40:40,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425060372] [2021-10-21 19:40:40,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:40:40,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:40:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:40:40,332 INFO L87 Difference]: Start difference. First operand 20891 states and 26869 transitions. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:40:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:42,941 INFO L93 Difference]: Finished difference Result 26244 states and 33478 transitions. [2021-10-21 19:40:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 19:40:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 118 [2021-10-21 19:40:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:43,028 INFO L225 Difference]: With dead ends: 26244 [2021-10-21 19:40:43,028 INFO L226 Difference]: Without dead ends: 26082 [2021-10-21 19:40:43,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1668.4ms TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:40:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26082 states. [2021-10-21 19:40:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26082 to 25019. [2021-10-21 19:40:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25019 states, 19786 states have (on average 1.2359749317699384) internal successors, (24455), 22050 states have internal predecessors, (24455), 2142 states have call successors, (2142), 1850 states have call predecessors, (2142), 3080 states have return successors, (5385), 1119 states have call predecessors, (5385), 2141 states have call successors, (5385) [2021-10-21 19:40:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25019 states to 25019 states and 31982 transitions. [2021-10-21 19:40:43,649 INFO L78 Accepts]: Start accepts. Automaton has 25019 states and 31982 transitions. Word has length 118 [2021-10-21 19:40:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:43,649 INFO L470 AbstractCegarLoop]: Abstraction has 25019 states and 31982 transitions. [2021-10-21 19:40:43,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:40:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 25019 states and 31982 transitions. [2021-10-21 19:40:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-21 19:40:43,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:43,658 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 9, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:43,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-21 19:40:43,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:40:43,874 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash -607088145, now seen corresponding path program 1 times [2021-10-21 19:40:43,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:43,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271962602] [2021-10-21 19:40:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:43,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:40:43,926 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:40:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:40:44,074 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:40:44,074 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:40:44,075 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:40:44,077 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-21 19:40:44,077 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-21 19:40:44,077 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-21 19:40:44,078 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-21 19:40:44,078 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-21 19:40:44,078 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-21 19:40:44,078 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-21 19:40:44,078 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-21 19:40:44,079 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-21 19:40:44,079 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-21 19:40:44,079 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-21 19:40:44,079 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-21 19:40:44,079 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-21 19:40:44,080 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-21 19:40:44,080 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:40:44,080 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:40:44,080 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:40:44,080 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:40:44,081 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:40:44,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:40:44,087 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:40:44,147 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 19:40:44,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:40:44 BoogieIcfgContainer [2021-10-21 19:40:44,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:40:44,244 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:40:44,244 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:40:44,244 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:40:44,245 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:39:32" (3/4) ... [2021-10-21 19:40:44,252 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:40:44,252 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:40:44,254 INFO L168 Benchmark]: Toolchain (without parser) took 73613.87 ms. Allocated memory was 98.6 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 75.3 MB in the beginning and 887.0 MB in the end (delta: -811.7 MB). Peak memory consumption was 667.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:44,254 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 73.4 MB. Free memory was 51.1 MB in the beginning and 51.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:40:44,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 556.30 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 67.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:44,255 INFO L168 Benchmark]: Boogie Preprocessor took 113.60 ms. Allocated memory is still 98.6 MB. Free memory was 67.1 MB in the beginning and 64.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:44,256 INFO L168 Benchmark]: RCFGBuilder took 728.26 ms. Allocated memory is still 98.6 MB. Free memory was 64.3 MB in the beginning and 66.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:44,257 INFO L168 Benchmark]: TraceAbstraction took 72201.78 ms. Allocated memory was 98.6 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 65.8 MB in the beginning and 887.0 MB in the end (delta: -821.2 MB). Peak memory consumption was 659.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:44,257 INFO L168 Benchmark]: Witness Printer took 8.16 ms. Allocated memory is still 1.6 GB. Free memory is still 887.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:40:44,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 73.4 MB. Free memory was 51.1 MB in the beginning and 51.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 556.30 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 67.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 113.60 ms. Allocated memory is still 98.6 MB. Free memory was 67.1 MB in the beginning and 64.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 728.26 ms. Allocated memory is still 98.6 MB. Free memory was 64.3 MB in the beginning and 66.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 72201.78 ms. Allocated memory was 98.6 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 65.8 MB in the beginning and 887.0 MB in the end (delta: -821.2 MB). Peak memory consumption was 659.2 MB. Max. memory is 16.1 GB. * Witness Printer took 8.16 ms. Allocated memory is still 1.6 GB. Free memory is still 887.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 [\old(garbage)=54, \old(garbage)=49, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=55, \old(S)=57, \old(t1)=70, \old(t1)=62, \old(t4)=58, \old(t4)=53, \old(x1)=74, \old(x1)=61, \old(x4)=51, \old(x4)=68, 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] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, 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 [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, 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] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, t4->next={0:0}, x1={-1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, 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 [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=1, pc4=5, 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 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 71991.2ms, OverallIterations: 28, TraceHistogramMax: 11, EmptinessCheckTime: 89.7ms, AutomataDifference: 42879.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2610 SDtfs, 9650 SDslu, 6262 SDs, 0 SdLazy, 21611 SolverSat, 3963 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15594.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2366 GetRequests, 1507 SyntacticMatches, 6 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 24850.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25019occurred in iteration=27, InterpolantAutomatonStates: 737, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6346.0ms AutomataMinimizationTime, 27 MinimizatonAttempts, 27612 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 524.2ms SsaConstructionTime, 1776.7ms SatisfiabilityAnalysisTime, 11060.8ms InterpolantComputationTime, 2592 NumberOfCodeBlocks, 2592 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2416 ConstructedInterpolants, 10 QuantifiedInterpolants, 11863 SizeOfPredicates, 78 NumberOfNonLiveVariables, 10163 ConjunctsInSsa, 373 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2905/3662 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 [2021-10-21 19:40:44,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/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-e943c26 [2021-10-21 19:40:46,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:40:46,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:40:46,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:40:46,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:40:46,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:40:46,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:40:46,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:40:46,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:40:46,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:40:46,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:40:46,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:40:46,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:40:46,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:40:46,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:40:46,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:40:46,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:40:46,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:40:46,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:40:46,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:40:46,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:40:46,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:40:46,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:40:46,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:40:46,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:40:46,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:40:46,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:40:46,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:40:46,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:40:46,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:40:46,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:40:46,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:40:46,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:40:46,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:40:46,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:40:46,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:40:46,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:40:46,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:40:46,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:40:46,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:40:46,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:40:46,847 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-21 19:40:46,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:40:46,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:40:46,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:40:46,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:40:46,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:40:46,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:40:46,902 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:40:46,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:40:46,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:40:46,903 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:40:46,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:40:46,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:40:46,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:40:46,905 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:40:46,905 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:40:46,905 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:40:46,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:40:46,906 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:40:46,906 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:40:46,906 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:40:46,906 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:40:46,907 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:40:46,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:40:46,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:40:46,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:40:46,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:40:46,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:40:46,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:40:46,908 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:40:46,909 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:40:46,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:40:46,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:40:46,910 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_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-10-21 19:40:47,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:40:47,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:40:47,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:40:47,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:40:47,340 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:40:47,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-21 19:40:47,410 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/a5cf011b2/973c64274ad543ef83a0b00e9aea086c/FLAG7cd1e00d8 [2021-10-21 19:40:48,085 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:40:48,085 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-21 19:40:48,102 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/a5cf011b2/973c64274ad543ef83a0b00e9aea086c/FLAG7cd1e00d8 [2021-10-21 19:40:48,351 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/data/a5cf011b2/973c64274ad543ef83a0b00e9aea086c [2021-10-21 19:40:48,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:40:48,355 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:40:48,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:40:48,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:40:48,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:40:48,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bab416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48, skipping insertion in model container [2021-10-21 19:40:48,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:40:48,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:40:48,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:40:48,798 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:40:48,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:40:48,896 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:40:48,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48 WrapperNode [2021-10-21 19:40:48,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:40:48,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:40:48,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:40:48,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:40:48,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:48,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:49,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:40:49,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:40:49,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:40:49,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:40:49,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (1/1) ... [2021-10-21 19:40:49,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:40:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:49,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:40:49,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:40:49,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:40:49,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:40:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:40:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:40:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:40:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:40:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:40:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:40:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:40:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-21 19:40:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-21 19:40:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:40:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:40:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:40:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:40:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:40:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:40:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:40:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:40:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:40:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:40:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:40:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:40:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:40:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:40:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:40:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:40:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:40:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:40:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:40:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:40:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:40:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:40:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:40:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:40:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:40:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:40:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:40:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:40:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:40:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:40:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:40:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:40:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:40:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:40:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:40:49,106 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:40:49,106 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:40:49,107 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:40:49,107 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:40:49,107 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:40:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:40:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:40:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:40:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:40:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:40:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:40:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:40:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:40:49,110 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:40:49,110 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:40:49,110 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:40:49,110 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:40:49,111 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:40:49,111 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:40:49,112 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:40:49,112 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:40:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:40:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:40:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:40:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:40:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:40:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:40:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:40:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:40:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:40:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:40:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:40:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:40:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:40:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:40:49,116 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:40:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:40:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:40:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:40:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:40:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:40:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:40:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:40:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:40:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:40:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:40:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:40:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:40:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:40:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:40:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:40:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:40:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:40:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:40:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:40:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:40:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:40:49,121 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:40:49,121 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:40:49,121 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:40:49,121 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:40:49,122 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:40:49,122 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:40:49,123 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:40:49,123 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:40:49,123 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:40:49,123 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:40:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:40:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:40:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:40:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:40:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:40:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:40:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:40:49,125 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:40:49,125 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:40:49,125 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:40:49,125 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:40:49,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:40:49,126 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-21 19:40:49,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:40:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:40:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:40:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-21 19:40:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:40:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:40:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:40:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:40:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:40:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:40:49,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:40:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:40:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 19:40:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 19:40:49,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:40:49,958 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:40:49,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:40:49 BoogieIcfgContainer [2021-10-21 19:40:49,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:40:49,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:40:49,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:40:49,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:40:49,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:40:48" (1/3) ... [2021-10-21 19:40:49,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c9966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:40:49, skipping insertion in model container [2021-10-21 19:40:49,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:48" (2/3) ... [2021-10-21 19:40:49,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c9966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:40:49, skipping insertion in model container [2021-10-21 19:40:49,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:40:49" (3/3) ... [2021-10-21 19:40:49,969 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-21 19:40:49,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:40:49,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-21 19:40:50,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:40:50,028 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 [2021-10-21 19:40:50,028 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-21 19:40:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:40:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:40:50,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:50,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:50,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:50,058 INFO L82 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-10-21 19:40:50,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:50,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105761568] [2021-10-21 19:40:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:50,072 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:50,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:50,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:40:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:50,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 19:40:50,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:50,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:50,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:50,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105761568] [2021-10-21 19:40:50,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105761568] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:50,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:50,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:40:50,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412045321] [2021-10-21 19:40:50,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:40:50,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:40:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:40:50,405 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:50,426 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-21 19:40:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:40:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-21 19:40:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:50,439 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:40:50,440 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 19:40:50,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:40:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 19:40:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 19:40:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:40:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-10-21 19:40:50,485 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-10-21 19:40:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:50,485 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-10-21 19:40:50,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:50,486 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-10-21 19:40:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:40:50,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:50,487 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:50,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:50,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:50,701 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:50,702 INFO L82 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-10-21 19:40:50,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:50,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692995818] [2021-10-21 19:40:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:50,704 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:50,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:50,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:50,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:40:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:40:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:51,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:51,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:51,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692995818] [2021-10-21 19:40:51,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692995818] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:51,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:51,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 19:40:51,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229114738] [2021-10-21 19:40:51,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:40:51,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:40:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:40:51,137 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:51,217 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-10-21 19:40:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:40:51,218 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-21 19:40:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:51,224 INFO L225 Difference]: With dead ends: 120 [2021-10-21 19:40:51,225 INFO L226 Difference]: Without dead ends: 120 [2021-10-21 19:40:51,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:40:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-21 19:40:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-10-21 19:40:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:40:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-10-21 19:40:51,257 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-10-21 19:40:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:51,257 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-10-21 19:40:51,258 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-10-21 19:40:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:40:51,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:51,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:51,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:51,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:51,478 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-10-21 19:40:51,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:51,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791288937] [2021-10-21 19:40:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:51,480 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:51,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:51,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:51,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:40:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:51,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:40:51,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:51,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:51,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:51,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791288937] [2021-10-21 19:40:51,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791288937] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:51,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:51,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:40:51,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555925666] [2021-10-21 19:40:51,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:40:51,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:40:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:40:51,716 INFO L87 Difference]: Start difference. First operand 102 states and 145 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:51,825 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-10-21 19:40:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:40:51,826 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-21 19:40:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:51,828 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:40:51,828 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:40:51,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:40:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:40:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-10-21 19:40:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:40:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-10-21 19:40:51,841 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-10-21 19:40:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:51,842 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-10-21 19:40:51,842 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-10-21 19:40:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:40:51,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:51,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:51,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:52,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:52,055 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-10-21 19:40:52,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:52,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207507574] [2021-10-21 19:40:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:52,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:52,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:52,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:52,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:40:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:40:52,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:52,307 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 [2021-10-21 19:40:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:52,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:52,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:52,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207507574] [2021-10-21 19:40:52,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207507574] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:52,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:52,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:40:52,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322388608] [2021-10-21 19:40:52,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:40:52,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:40:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:40:52,344 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:52,475 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-10-21 19:40:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:40:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:40:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:52,479 INFO L225 Difference]: With dead ends: 198 [2021-10-21 19:40:52,479 INFO L226 Difference]: Without dead ends: 198 [2021-10-21 19:40:52,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:40:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-21 19:40:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-21 19:40:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-21 19:40:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-10-21 19:40:52,502 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-10-21 19:40:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:52,502 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-10-21 19:40:52,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-10-21 19:40:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:40:52,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:52,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:52,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:52,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:52,716 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:52,716 INFO L82 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-10-21 19:40:52,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:52,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996579044] [2021-10-21 19:40:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:52,718 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:52,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:52,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:52,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 19:40:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:52,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:40:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:52,920 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 [2021-10-21 19:40:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:52,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:53,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:53,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996579044] [2021-10-21 19:40:53,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996579044] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:53,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:53,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-21 19:40:53,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672331612] [2021-10-21 19:40:53,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:40:53,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:53,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:40:53,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:40:53,010 INFO L87 Difference]: Start difference. First operand 177 states and 276 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:53,303 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-10-21 19:40:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:40:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:40:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:53,308 INFO L225 Difference]: With dead ends: 333 [2021-10-21 19:40:53,308 INFO L226 Difference]: Without dead ends: 333 [2021-10-21 19:40:53,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:40:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-10-21 19:40:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-10-21 19:40:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-10-21 19:40:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-10-21 19:40:53,333 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-10-21 19:40:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:53,334 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-10-21 19:40:53,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-10-21 19:40:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:40:53,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:53,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:53,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:53,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:53,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-10-21 19:40:53,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:53,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306010162] [2021-10-21 19:40:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:53,547 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:53,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:53,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:53,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 19:40:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:40:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:53,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:53,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:53,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306010162] [2021-10-21 19:40:53,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306010162] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:53,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:53,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 19:40:53,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50084477] [2021-10-21 19:40:53,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:40:53,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:53,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:40:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:40:53,843 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:53,883 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-10-21 19:40:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:40:53,884 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 19:40:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:53,886 INFO L225 Difference]: With dead ends: 197 [2021-10-21 19:40:53,886 INFO L226 Difference]: Without dead ends: 197 [2021-10-21 19:40:53,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:40:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-21 19:40:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-10-21 19:40:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-21 19:40:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-10-21 19:40:53,913 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-10-21 19:40:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:53,914 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-10-21 19:40:53,914 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-10-21 19:40:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:40:53,916 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:53,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:53,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:54,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:54,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:54,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:54,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-10-21 19:40:54,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:54,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208951572] [2021-10-21 19:40:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:54,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:54,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:54,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:54,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 19:40:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:40:54,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:54,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:54,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:54,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208951572] [2021-10-21 19:40:54,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208951572] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:54,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:54,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 19:40:54,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964297818] [2021-10-21 19:40:54,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:40:54,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:40:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:40:54,422 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:54,457 INFO L93 Difference]: Finished difference Result 297 states and 420 transitions. [2021-10-21 19:40:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:40:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:40:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:54,460 INFO L225 Difference]: With dead ends: 297 [2021-10-21 19:40:54,460 INFO L226 Difference]: Without dead ends: 297 [2021-10-21 19:40:54,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:40:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-10-21 19:40:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 281. [2021-10-21 19:40:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-10-21 19:40:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-10-21 19:40:54,474 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-10-21 19:40:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:54,475 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-10-21 19:40:54,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:40:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-10-21 19:40:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:40:54,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:54,482 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:54,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:54,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:54,694 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:54,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-10-21 19:40:54,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:54,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796218794] [2021-10-21 19:40:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:54,695 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:54,696 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:54,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 19:40:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:54,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:40:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:54,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:55,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:55,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796218794] [2021-10-21 19:40:55,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796218794] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:40:55,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:55,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-21 19:40:55,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231159330] [2021-10-21 19:40:55,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:40:55,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:55,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:40:55,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:40:55,213 INFO L87 Difference]: Start difference. First operand 281 states and 404 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:40:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:55,911 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-10-21 19:40:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:40:55,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-10-21 19:40:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:55,917 INFO L225 Difference]: With dead ends: 690 [2021-10-21 19:40:55,917 INFO L226 Difference]: Without dead ends: 690 [2021-10-21 19:40:55,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:40:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-21 19:40:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-10-21 19:40:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 472 states have (on average 1.5423728813559323) internal successors, (728), 520 states have internal predecessors, (728), 42 states have call successors, (42), 42 states have call predecessors, (42), 61 states have return successors, (95), 25 states have call predecessors, (95), 41 states have call successors, (95) [2021-10-21 19:40:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-10-21 19:40:55,952 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-10-21 19:40:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:55,952 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-10-21 19:40:55,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:40:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-10-21 19:40:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:40:55,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:55,954 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:55,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:56,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:56,166 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:56,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-10-21 19:40:56,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:56,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103318824] [2021-10-21 19:40:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:56,167 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:56,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:56,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 19:40:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:40:56,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:56,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:56,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103318824] [2021-10-21 19:40:56,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103318824] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:40:56,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:56,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-21 19:40:56,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338814523] [2021-10-21 19:40:56,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:40:56,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:40:56,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:40:56,681 INFO L87 Difference]: Start difference. First operand 587 states and 865 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:40:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:57,269 INFO L93 Difference]: Finished difference Result 945 states and 1354 transitions. [2021-10-21 19:40:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:40:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-10-21 19:40:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:57,280 INFO L225 Difference]: With dead ends: 945 [2021-10-21 19:40:57,280 INFO L226 Difference]: Without dead ends: 945 [2021-10-21 19:40:57,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:40:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-10-21 19:40:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 837. [2021-10-21 19:40:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 666 states have (on average 1.509009009009009) internal successors, (1005), 738 states have internal predecessors, (1005), 62 states have call successors, (62), 62 states have call predecessors, (62), 97 states have return successors, (127), 37 states have call predecessors, (127), 61 states have call successors, (127) [2021-10-21 19:40:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1194 transitions. [2021-10-21 19:40:57,320 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1194 transitions. Word has length 20 [2021-10-21 19:40:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:57,321 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1194 transitions. [2021-10-21 19:40:57,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:40:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1194 transitions. [2021-10-21 19:40:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:40:57,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:57,323 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:57,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:57,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:57,546 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:57,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-10-21 19:40:57,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:57,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547853959] [2021-10-21 19:40:57,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:40:57,547 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:57,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:57,547 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:57,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-21 19:40:57,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:40:57,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:40:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:40:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:40:57,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:40:58,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:58,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547853959] [2021-10-21 19:40:58,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547853959] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:40:58,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:58,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-21 19:40:58,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355201706] [2021-10-21 19:40:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:40:58,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:40:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:40:58,131 INFO L87 Difference]: Start difference. First operand 837 states and 1194 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:40:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:58,342 INFO L93 Difference]: Finished difference Result 1191 states and 1639 transitions. [2021-10-21 19:40:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:40:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2021-10-21 19:40:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:58,351 INFO L225 Difference]: With dead ends: 1191 [2021-10-21 19:40:58,352 INFO L226 Difference]: Without dead ends: 1191 [2021-10-21 19:40:58,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:40:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-10-21 19:40:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1147. [2021-10-21 19:40:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 908 states have (on average 1.4515418502202644) internal successors, (1318), 1016 states have internal predecessors, (1318), 82 states have call successors, (82), 82 states have call predecessors, (82), 145 states have return successors, (195), 49 states have call predecessors, (195), 81 states have call successors, (195) [2021-10-21 19:40:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1595 transitions. [2021-10-21 19:40:58,404 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1595 transitions. Word has length 27 [2021-10-21 19:40:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:58,404 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1595 transitions. [2021-10-21 19:40:58,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:40:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1595 transitions. [2021-10-21 19:40:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:40:58,406 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:58,407 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:58,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:58,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:40:58,619 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:40:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-10-21 19:40:58,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:40:58,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916754989] [2021-10-21 19:40:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:58,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:40:58,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:40:58,622 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:40:58,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-21 19:40:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:58,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:40:58,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:59,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:40:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:59,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:40:59,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916754989] [2021-10-21 19:40:59,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916754989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:40:59,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:59,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-21 19:40:59,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873573184] [2021-10-21 19:40:59,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:40:59,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:40:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:40:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:40:59,653 INFO L87 Difference]: Start difference. First operand 1147 states and 1595 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:41:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:00,524 INFO L93 Difference]: Finished difference Result 1680 states and 2292 transitions. [2021-10-21 19:41:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:41:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2021-10-21 19:41:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:00,536 INFO L225 Difference]: With dead ends: 1680 [2021-10-21 19:41:00,537 INFO L226 Difference]: Without dead ends: 1680 [2021-10-21 19:41:00,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:41:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-10-21 19:41:00,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-10-21 19:41:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1157 states have (on average 1.418323249783924) internal successors, (1641), 1297 states have internal predecessors, (1641), 107 states have call successors, (107), 107 states have call predecessors, (107), 191 states have return successors, (265), 63 states have call predecessors, (265), 106 states have call successors, (265) [2021-10-21 19:41:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2013 transitions. [2021-10-21 19:41:00,620 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2013 transitions. Word has length 29 [2021-10-21 19:41:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:00,621 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2013 transitions. [2021-10-21 19:41:00,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:41:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2013 transitions. [2021-10-21 19:41:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:41:00,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:00,623 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:00,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:00,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:00,837 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-10-21 19:41:00,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:00,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938443547] [2021-10-21 19:41:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:00,838 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:00,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:00,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:00,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-21 19:41:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:01,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:41:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:41:01,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:41:01,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:01,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938443547] [2021-10-21 19:41:01,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938443547] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:01,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:01,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-10-21 19:41:01,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814881159] [2021-10-21 19:41:01,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:41:01,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:41:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:41:01,622 INFO L87 Difference]: Start difference. First operand 1467 states and 2013 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:41:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:02,677 INFO L93 Difference]: Finished difference Result 1681 states and 2147 transitions. [2021-10-21 19:41:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:41:02,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-10-21 19:41:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:02,686 INFO L225 Difference]: With dead ends: 1681 [2021-10-21 19:41:02,687 INFO L226 Difference]: Without dead ends: 1497 [2021-10-21 19:41:02,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:41:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-10-21 19:41:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-10-21 19:41:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1071 states have (on average 1.38468720821662) internal successors, (1483), 1209 states have internal predecessors, (1483), 107 states have call successors, (107), 107 states have call predecessors, (107), 189 states have return successors, (237), 63 states have call predecessors, (237), 106 states have call successors, (237) [2021-10-21 19:41:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1827 transitions. [2021-10-21 19:41:02,736 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1827 transitions. Word has length 30 [2021-10-21 19:41:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:02,737 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1827 transitions. [2021-10-21 19:41:02,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:41:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1827 transitions. [2021-10-21 19:41:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:41:02,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:02,739 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:02,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:02,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:02,976 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-10-21 19:41:02,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:02,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133471613] [2021-10-21 19:41:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:41:02,978 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:02,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:02,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-21 19:41:03,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:41:03,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:41:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:41:03,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:41:03,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:41:03,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133471613] [2021-10-21 19:41:03,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133471613] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:03,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:03,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-10-21 19:41:03,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426007628] [2021-10-21 19:41:03,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:41:03,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:03,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:41:03,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:41:03,835 INFO L87 Difference]: Start difference. First operand 1379 states and 1827 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:41:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:05,156 INFO L93 Difference]: Finished difference Result 2266 states and 3058 transitions. [2021-10-21 19:41:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:41:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-10-21 19:41:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:05,171 INFO L225 Difference]: With dead ends: 2266 [2021-10-21 19:41:05,171 INFO L226 Difference]: Without dead ends: 2170 [2021-10-21 19:41:05,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:41:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-10-21 19:41:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-10-21 19:41:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1543 states have (on average 1.4121840570317563) internal successors, (2179), 1753 states have internal predecessors, (2179), 165 states have call successors, (165), 153 states have call predecessors, (165), 273 states have return successors, (421), 87 states have call predecessors, (421), 164 states have call successors, (421) [2021-10-21 19:41:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2765 transitions. [2021-10-21 19:41:05,260 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2765 transitions. Word has length 39 [2021-10-21 19:41:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:05,260 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2765 transitions. [2021-10-21 19:41:05,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:41:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2765 transitions. [2021-10-21 19:41:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:41:05,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:05,263 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:05,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:05,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:05,475 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-10-21 19:41:05,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:05,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388669743] [2021-10-21 19:41:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:05,476 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:05,477 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:05,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-21 19:41:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:41:05,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:41:06,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:41:06,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:06,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388669743] [2021-10-21 19:41:06,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388669743] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:06,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:06,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-21 19:41:06,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897089801] [2021-10-21 19:41:06,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:41:06,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:41:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:41:06,597 INFO L87 Difference]: Start difference. First operand 1993 states and 2765 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:41:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:08,201 INFO L93 Difference]: Finished difference Result 2261 states and 2971 transitions. [2021-10-21 19:41:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:41:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-10-21 19:41:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:08,214 INFO L225 Difference]: With dead ends: 2261 [2021-10-21 19:41:08,215 INFO L226 Difference]: Without dead ends: 2089 [2021-10-21 19:41:08,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:41:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-10-21 19:41:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-10-21 19:41:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1469 states have (on average 1.3921034717494893) internal successors, (2045), 1677 states have internal predecessors, (2045), 165 states have call successors, (165), 153 states have call predecessors, (165), 271 states have return successors, (393), 87 states have call predecessors, (393), 164 states have call successors, (393) [2021-10-21 19:41:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2603 transitions. [2021-10-21 19:41:08,290 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2603 transitions. Word has length 39 [2021-10-21 19:41:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:08,290 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2603 transitions. [2021-10-21 19:41:08,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:41:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2603 transitions. [2021-10-21 19:41:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:41:08,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:08,292 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:08,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:08,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:08,505 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-10-21 19:41:08,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:08,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377776838] [2021-10-21 19:41:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:08,506 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:08,508 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:08,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-21 19:41:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:41:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:41:09,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:41:11,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:11,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377776838] [2021-10-21 19:41:11,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377776838] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:11,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:11,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-10-21 19:41:11,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095331213] [2021-10-21 19:41:11,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:41:11,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:41:11,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:41:11,161 INFO L87 Difference]: Start difference. First operand 1917 states and 2603 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:41:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:15,649 INFO L93 Difference]: Finished difference Result 3752 states and 4910 transitions. [2021-10-21 19:41:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 19:41:15,650 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2021-10-21 19:41:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:15,672 INFO L225 Difference]: With dead ends: 3752 [2021-10-21 19:41:15,672 INFO L226 Difference]: Without dead ends: 3716 [2021-10-21 19:41:15,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2799.2ms TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-10-21 19:41:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-10-21 19:41:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-10-21 19:41:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2325 states have (on average 1.3372043010752688) internal successors, (3109), 2625 states have internal predecessors, (3109), 257 states have call successors, (257), 257 states have call predecessors, (257), 423 states have return successors, (665), 135 states have call predecessors, (665), 256 states have call successors, (665) [2021-10-21 19:41:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4031 transitions. [2021-10-21 19:41:15,815 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4031 transitions. Word has length 45 [2021-10-21 19:41:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:15,816 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4031 transitions. [2021-10-21 19:41:15,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:41:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4031 transitions. [2021-10-21 19:41:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:41:15,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:15,818 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:15,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:16,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:16,031 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-10-21 19:41:16,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:16,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133310563] [2021-10-21 19:41:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:16,033 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:16,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:16,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-21 19:41:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:16,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:41:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:41:16,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:41:17,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:17,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133310563] [2021-10-21 19:41:17,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133310563] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:17,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:17,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-10-21 19:41:17,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477556421] [2021-10-21 19:41:17,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:41:17,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:41:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:41:17,345 INFO L87 Difference]: Start difference. First operand 3017 states and 4031 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:41:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:19,050 INFO L93 Difference]: Finished difference Result 4090 states and 5262 transitions. [2021-10-21 19:41:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:41:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-10-21 19:41:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:19,084 INFO L225 Difference]: With dead ends: 4090 [2021-10-21 19:41:19,085 INFO L226 Difference]: Without dead ends: 3950 [2021-10-21 19:41:19,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:41:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-10-21 19:41:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-10-21 19:41:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2853 states have (on average 1.3168594461969856) internal successors, (3757), 3219 states have internal predecessors, (3757), 326 states have call successors, (326), 326 states have call predecessors, (326), 525 states have return successors, (779), 171 states have call predecessors, (779), 325 states have call successors, (779) [2021-10-21 19:41:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4862 transitions. [2021-10-21 19:41:19,218 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4862 transitions. Word has length 48 [2021-10-21 19:41:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:19,219 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4862 transitions. [2021-10-21 19:41:19,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:41:19,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4862 transitions. [2021-10-21 19:41:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:41:19,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:19,221 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:19,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:19,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:19,435 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:19,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:19,435 INFO L82 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-10-21 19:41:19,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:19,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017821167] [2021-10-21 19:41:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:19,436 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:19,438 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:19,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-21 19:41:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:41:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-21 19:41:20,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:41:21,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:21,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017821167] [2021-10-21 19:41:21,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017821167] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:21,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:21,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-10-21 19:41:21,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475799263] [2021-10-21 19:41:21,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:41:21,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:21,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:41:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:41:21,046 INFO L87 Difference]: Start difference. First operand 3716 states and 4862 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:41:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:24,020 INFO L93 Difference]: Finished difference Result 4249 states and 5467 transitions. [2021-10-21 19:41:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:41:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 59 [2021-10-21 19:41:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:24,049 INFO L225 Difference]: With dead ends: 4249 [2021-10-21 19:41:24,049 INFO L226 Difference]: Without dead ends: 4177 [2021-10-21 19:41:24,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1317.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 19:41:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-10-21 19:41:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-10-21 19:41:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3083 states have (on average 1.3139798897178074) internal successors, (4051), 3485 states have internal predecessors, (4051), 349 states have call successors, (349), 349 states have call predecessors, (349), 573 states have return successors, (833), 183 states have call predecessors, (833), 348 states have call successors, (833) [2021-10-21 19:41:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5233 transitions. [2021-10-21 19:41:24,195 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5233 transitions. Word has length 59 [2021-10-21 19:41:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:24,196 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5233 transitions. [2021-10-21 19:41:24,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:41:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5233 transitions. [2021-10-21 19:41:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-21 19:41:24,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:24,199 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:24,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:24,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:24,424 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-10-21 19:41:24,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:24,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863306481] [2021-10-21 19:41:24,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:41:24,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:24,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:24,427 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:24,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-21 19:41:25,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:41:25,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:41:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:41:25,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-21 19:41:26,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:41:28,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:28,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863306481] [2021-10-21 19:41:28,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863306481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:28,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:28,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-10-21 19:41:28,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690991914] [2021-10-21 19:41:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 19:41:28,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 19:41:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:41:28,463 INFO L87 Difference]: Start difference. First operand 4017 states and 5233 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-21 19:41:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:36,472 INFO L93 Difference]: Finished difference Result 7214 states and 9448 transitions. [2021-10-21 19:41:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-21 19:41:36,474 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 70 [2021-10-21 19:41:36,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:36,519 INFO L225 Difference]: With dead ends: 7214 [2021-10-21 19:41:36,520 INFO L226 Difference]: Without dead ends: 7154 [2021-10-21 19:41:36,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4954.0ms TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 19:41:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-10-21 19:41:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-10-21 19:41:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3907 states have (on average 1.3137957512157665) internal successors, (5133), 4429 states have internal predecessors, (5133), 421 states have call successors, (421), 421 states have call predecessors, (421), 731 states have return successors, (1057), 221 states have call predecessors, (1057), 420 states have call successors, (1057) [2021-10-21 19:41:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6611 transitions. [2021-10-21 19:41:36,758 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6611 transitions. Word has length 70 [2021-10-21 19:41:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:36,760 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6611 transitions. [2021-10-21 19:41:36,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-21 19:41:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6611 transitions. [2021-10-21 19:41:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-21 19:41:36,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:36,765 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:36,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:36,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:36,978 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:36,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-10-21 19:41:36,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:36,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500690239] [2021-10-21 19:41:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:36,980 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:36,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:36,981 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:36,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-21 19:41:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:41:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-21 19:41:37,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-21 19:41:38,316 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:38,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500690239] [2021-10-21 19:41:38,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500690239] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:38,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:38,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-21 19:41:38,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98138327] [2021-10-21 19:41:38,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:41:38,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:41:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:41:38,319 INFO L87 Difference]: Start difference. First operand 5071 states and 6611 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-21 19:41:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:38,993 INFO L93 Difference]: Finished difference Result 9835 states and 12944 transitions. [2021-10-21 19:41:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:41:38,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2021-10-21 19:41:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:39,044 INFO L225 Difference]: With dead ends: 9835 [2021-10-21 19:41:39,044 INFO L226 Difference]: Without dead ends: 9835 [2021-10-21 19:41:39,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:41:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-10-21 19:41:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 9811. [2021-10-21 19:41:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9811 states, 7495 states have (on average 1.313809206137425) internal successors, (9847), 8623 states have internal predecessors, (9847), 778 states have call successors, (778), 778 states have call predecessors, (778), 1526 states have return successors, (2299), 410 states have call predecessors, (2299), 777 states have call successors, (2299) [2021-10-21 19:41:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 12924 transitions. [2021-10-21 19:41:39,382 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 12924 transitions. Word has length 71 [2021-10-21 19:41:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:39,383 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 12924 transitions. [2021-10-21 19:41:39,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-21 19:41:39,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 12924 transitions. [2021-10-21 19:41:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:41:39,385 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:39,385 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:39,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:39,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:39,601 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -511357765, now seen corresponding path program 1 times [2021-10-21 19:41:39,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:39,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563416768] [2021-10-21 19:41:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:39,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:39,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:39,605 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:39,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-21 19:41:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:41:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:40,422 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 [2021-10-21 19:41:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 19:41:41,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 19:41:42,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:42,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563416768] [2021-10-21 19:41:42,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563416768] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:42,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:42,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-21 19:41:42,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508933923] [2021-10-21 19:41:42,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:41:42,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:41:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:41:42,099 INFO L87 Difference]: Start difference. First operand 9811 states and 12924 transitions. Second operand has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-10-21 19:41:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:44,482 INFO L93 Difference]: Finished difference Result 16626 states and 22220 transitions. [2021-10-21 19:41:44,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:41:44,483 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 79 [2021-10-21 19:41:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:44,544 INFO L225 Difference]: With dead ends: 16626 [2021-10-21 19:41:44,544 INFO L226 Difference]: Without dead ends: 16626 [2021-10-21 19:41:44,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 959.9ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:41:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16626 states. [2021-10-21 19:41:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16626 to 14338. [2021-10-21 19:41:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14338 states, 11019 states have (on average 1.329793992195299) internal successors, (14653), 12646 states have internal predecessors, (14653), 1114 states have call successors, (1114), 1114 states have call predecessors, (1114), 2194 states have return successors, (3523), 578 states have call predecessors, (3523), 1113 states have call successors, (3523) [2021-10-21 19:41:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14338 states to 14338 states and 19290 transitions. [2021-10-21 19:41:45,078 INFO L78 Accepts]: Start accepts. Automaton has 14338 states and 19290 transitions. Word has length 79 [2021-10-21 19:41:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:45,079 INFO L470 AbstractCegarLoop]: Abstraction has 14338 states and 19290 transitions. [2021-10-21 19:41:45,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-10-21 19:41:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 14338 states and 19290 transitions. [2021-10-21 19:41:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:41:45,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:45,088 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:45,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:45,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:45,305 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:45,305 INFO L82 PathProgramCache]: Analyzing trace with hash -511357764, now seen corresponding path program 1 times [2021-10-21 19:41:45,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:45,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797133242] [2021-10-21 19:41:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:45,306 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:45,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:45,308 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:45,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-21 19:41:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:46,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 19:41:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:46,326 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 [2021-10-21 19:41:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 19:41:47,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:41:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 19:41:50,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:41:50,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797133242] [2021-10-21 19:41:50,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797133242] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:41:50,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:50,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-21 19:41:50,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189981165] [2021-10-21 19:41:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:41:50,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:41:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:41:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:41:50,813 INFO L87 Difference]: Start difference. First operand 14338 states and 19290 transitions. Second operand has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-21 19:41:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:58,032 INFO L93 Difference]: Finished difference Result 22975 states and 31271 transitions. [2021-10-21 19:41:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:41:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 79 [2021-10-21 19:41:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:58,129 INFO L225 Difference]: With dead ends: 22975 [2021-10-21 19:41:58,129 INFO L226 Difference]: Without dead ends: 22975 [2021-10-21 19:41:58,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 4101.0ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:41:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22975 states. [2021-10-21 19:41:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22975 to 19568. [2021-10-21 19:41:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19568 states, 15241 states have (on average 1.3503707105832952) internal successors, (20581), 17376 states have internal predecessors, (20581), 1446 states have call successors, (1446), 1446 states have call predecessors, (1446), 2870 states have return successors, (4913), 746 states have call predecessors, (4913), 1445 states have call successors, (4913) [2021-10-21 19:41:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19568 states to 19568 states and 26940 transitions. [2021-10-21 19:41:58,917 INFO L78 Accepts]: Start accepts. Automaton has 19568 states and 26940 transitions. Word has length 79 [2021-10-21 19:41:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:58,918 INFO L470 AbstractCegarLoop]: Abstraction has 19568 states and 26940 transitions. [2021-10-21 19:41:58,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-21 19:41:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 19568 states and 26940 transitions. [2021-10-21 19:41:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:41:58,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:58,924 INFO L512 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:58,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:59,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:41:59,142 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:41:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash 175036294, now seen corresponding path program 1 times [2021-10-21 19:41:59,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:41:59,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618853374] [2021-10-21 19:41:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:59,143 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:41:59,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:41:59,144 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:41:59,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-21 19:42:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:42:00,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-10-21 19:42:00,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:42:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 29 proven. 42 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-21 19:42:01,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:42:01,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618853374] [2021-10-21 19:42:01,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618853374] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:42:01,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:01,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-21 19:42:01,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92629887] [2021-10-21 19:42:01,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:42:01,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:42:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:42:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:42:01,141 INFO L87 Difference]: Start difference. First operand 19568 states and 26940 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-21 19:42:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:02,886 INFO L93 Difference]: Finished difference Result 26145 states and 35199 transitions. [2021-10-21 19:42:02,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:42:02,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 98 [2021-10-21 19:42:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:02,987 INFO L225 Difference]: With dead ends: 26145 [2021-10-21 19:42:02,988 INFO L226 Difference]: Without dead ends: 24927 [2021-10-21 19:42:02,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:42:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24927 states. [2021-10-21 19:42:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24927 to 23061. [2021-10-21 19:42:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23061 states, 17872 states have (on average 1.3545210384959714) internal successors, (24208), 20491 states have internal predecessors, (24208), 1698 states have call successors, (1698), 1698 states have call predecessors, (1698), 3480 states have return successors, (5737), 872 states have call predecessors, (5737), 1697 states have call successors, (5737) [2021-10-21 19:42:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23061 states to 23061 states and 31643 transitions. [2021-10-21 19:42:04,180 INFO L78 Accepts]: Start accepts. Automaton has 23061 states and 31643 transitions. Word has length 98 [2021-10-21 19:42:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:04,181 INFO L470 AbstractCegarLoop]: Abstraction has 23061 states and 31643 transitions. [2021-10-21 19:42:04,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-21 19:42:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 23061 states and 31643 transitions. [2021-10-21 19:42:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-21 19:42:04,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:04,190 INFO L512 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:04,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:04,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:42:04,406 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:42:04,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash -159277390, now seen corresponding path program 2 times [2021-10-21 19:42:04,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:42:04,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775513603] [2021-10-21 19:42:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:42:04,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:42:04,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:42:04,411 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:42:04,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-21 19:42:05,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:42:05,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:42:05,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 92 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-21 19:42:06,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:42:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 48 proven. 57 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-21 19:42:06,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:42:06,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775513603] [2021-10-21 19:42:06,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775513603] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:42:06,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:06,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-10-21 19:42:06,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469703093] [2021-10-21 19:42:06,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:42:06,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:42:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:42:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:42:06,978 INFO L87 Difference]: Start difference. First operand 23061 states and 31643 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-21 19:42:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:09,556 INFO L93 Difference]: Finished difference Result 65936 states and 93992 transitions. [2021-10-21 19:42:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:42:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 107 [2021-10-21 19:42:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:09,806 INFO L225 Difference]: With dead ends: 65936 [2021-10-21 19:42:09,806 INFO L226 Difference]: Without dead ends: 64256 [2021-10-21 19:42:09,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1430.6ms TimeCoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 19:42:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64256 states. [2021-10-21 19:42:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64256 to 61721. [2021-10-21 19:42:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61721 states, 48744 states have (on average 1.338667323157722) internal successors, (65252), 54131 states have internal predecessors, (65252), 5038 states have call successors, (5038), 5038 states have call predecessors, (5038), 7928 states have return successors, (18397), 2552 states have call predecessors, (18397), 5037 states have call successors, (18397) [2021-10-21 19:42:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61721 states to 61721 states and 88687 transitions. [2021-10-21 19:42:12,552 INFO L78 Accepts]: Start accepts. Automaton has 61721 states and 88687 transitions. Word has length 107 [2021-10-21 19:42:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:12,553 INFO L470 AbstractCegarLoop]: Abstraction has 61721 states and 88687 transitions. [2021-10-21 19:42:12,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-21 19:42:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 61721 states and 88687 transitions. [2021-10-21 19:42:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-21 19:42:12,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:12,558 INFO L512 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:12,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-21 19:42:12,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:42:12,774 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:42:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1851960145, now seen corresponding path program 1 times [2021-10-21 19:42:12,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:42:12,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126995105] [2021-10-21 19:42:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:12,775 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:42:12,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:42:12,777 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:42:13,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-21 19:42:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:42:14,355 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:42:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:42:14,904 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 19:42:14,904 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:42:14,905 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:42:14,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-21 19:42:14,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-21 19:42:14,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-21 19:42:14,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-21 19:42:14,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-21 19:42:14,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-21 19:42:14,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-21 19:42:14,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-21 19:42:14,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-21 19:42:14,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-21 19:42:14,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-21 19:42:14,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-21 19:42:14,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-21 19:42:14,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-21 19:42:14,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:42:14,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:42:14,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:42:14,911 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:42:14,911 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:42:14,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:15,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:42:15,124 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:42:15,184 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 19:42:15,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:42:15 BoogieIcfgContainer [2021-10-21 19:42:15,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:42:15,267 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:42:15,267 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:42:15,267 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:42:15,267 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:40:49" (3/4) ... [2021-10-21 19:42:15,270 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:42:15,271 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:42:15,272 INFO L168 Benchmark]: Toolchain (without parser) took 86916.11 ms. Allocated memory was 77.6 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 40.9 MB in the beginning and 875.9 MB in the end (delta: -835.0 MB). Peak memory consumption was 370.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:15,273 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 77.6 MB. Free memory was 58.7 MB in the beginning and 58.6 MB in the end (delta: 66.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:42:15,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 541.65 ms. Allocated memory is still 77.6 MB. Free memory was 40.7 MB in the beginning and 54.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:15,274 INFO L168 Benchmark]: Boogie Preprocessor took 106.14 ms. Allocated memory is still 77.6 MB. Free memory was 53.8 MB in the beginning and 50.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:15,274 INFO L168 Benchmark]: RCFGBuilder took 954.09 ms. Allocated memory is still 77.6 MB. Free memory was 50.7 MB in the beginning and 49.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:15,275 INFO L168 Benchmark]: TraceAbstraction took 85303.90 ms. Allocated memory was 77.6 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 49.0 MB in the beginning and 876.9 MB in the end (delta: -828.0 MB). Peak memory consumption was 415.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:15,275 INFO L168 Benchmark]: Witness Printer took 4.30 ms. Allocated memory is still 1.3 GB. Free memory was 876.9 MB in the beginning and 875.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:15,277 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 77.6 MB. Free memory was 58.7 MB in the beginning and 58.6 MB in the end (delta: 66.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 541.65 ms. Allocated memory is still 77.6 MB. Free memory was 40.7 MB in the beginning and 54.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 106.14 ms. Allocated memory is still 77.6 MB. Free memory was 53.8 MB in the beginning and 50.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 954.09 ms. Allocated memory is still 77.6 MB. Free memory was 50.7 MB in the beginning and 49.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 85303.90 ms. Allocated memory was 77.6 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 49.0 MB in the beginning and 876.9 MB in the end (delta: -828.0 MB). Peak memory consumption was 415.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.30 ms. Allocated memory is still 1.3 GB. Free memory was 876.9 MB in the beginning and 875.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 [\old(garbage)=null, \old(garbage)=null, \old(pc1)=18, \old(pc4)=28, \old(res4)=22, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, 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 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, 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 [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, 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 TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, t4->next={0:0}, x1={1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, 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 [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=1, pc4=5, 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 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 85102.3ms, OverallIterations: 24, TraceHistogramMax: 10, EmptinessCheckTime: 67.7ms, AutomataDifference: 39735.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3107 SDtfs, 16252 SDslu, 5564 SDs, 0 SdLazy, 14139 SolverSat, 3928 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19235.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2263 GetRequests, 1651 SyntacticMatches, 10 SemanticMatches, 602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 19781.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=61721occurred in iteration=23, InterpolantAutomatonStates: 468, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6814.1ms AutomataMinimizationTime, 23 MinimizatonAttempts, 14350 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 555.8ms SsaConstructionTime, 2881.2ms SatisfiabilityAnalysisTime, 21543.2ms InterpolantComputationTime, 1039 NumberOfCodeBlocks, 1039 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1814 ConstructedInterpolants, 20 QuantifiedInterpolants, 11966 SizeOfPredicates, 83 NumberOfNonLiveVariables, 6593 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 46 InterpolantComputations, 14 PerfectInterpolantSequences, 1431/2450 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 [2021-10-21 19:42:15,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f9ac83c-6b6a-4cb4-a45b-66ef416720d0/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...