./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg --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_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg --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-b2eff8b [2021-10-28 08:48:26,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:48:26,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:48:26,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:48:26,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:48:26,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:48:26,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:48:26,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:48:26,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:48:26,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:48:26,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:48:26,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:48:26,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:48:26,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:48:26,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:48:26,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:48:26,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:48:26,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:48:26,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:48:26,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:48:26,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:48:26,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:48:26,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:48:26,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:48:26,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:48:26,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:48:26,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:48:26,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:48:26,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:48:26,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:48:26,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:48:26,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:48:26,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:48:26,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:48:26,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:48:26,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:48:26,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:48:26,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:48:26,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:48:26,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:48:26,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:48:26,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:48:26,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:48:26,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:48:26,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:48:26,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:48:26,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:48:26,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:48:26,983 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:48:26,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:48:26,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:48:26,984 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:48:26,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:48:26,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:48:26,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:48:26,985 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:48:26,985 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:48:26,985 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:48:26,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:48:26,986 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:48:26,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:48:26,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:48:26,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:48:26,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:48:26,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:48:26,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:48:26,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:48:26,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:48:26,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:48:26,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:48:26,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:48:26,989 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_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-10-28 08:48:27,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:48:27,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:48:27,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:48:27,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:48:27,328 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:48:27,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 08:48:27,419 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/f28d0ee31/9b349bd05dbf496d8cf90725013ba338/FLAGfdf55ec4f [2021-10-28 08:48:28,027 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:48:28,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 08:48:28,056 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/f28d0ee31/9b349bd05dbf496d8cf90725013ba338/FLAGfdf55ec4f [2021-10-28 08:48:28,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/f28d0ee31/9b349bd05dbf496d8cf90725013ba338 [2021-10-28 08:48:28,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:48:28,281 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:48:28,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:48:28,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:48:28,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:48:28,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:48:28" (1/1) ... [2021-10-28 08:48:28,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52337c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:28, skipping insertion in model container [2021-10-28 08:48:28,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:48:28" (1/1) ... [2021-10-28 08:48:28,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:48:28,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:48:29,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:48:29,275 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:48:29,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:48:29,357 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:48:29,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29 WrapperNode [2021-10-28 08:48:29,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:48:29,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:48:29,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:48:29,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:48:29,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:48:29,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:48:29,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:48:29,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:48:29,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (1/1) ... [2021-10-28 08:48:29,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:48:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:29,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:48:29,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:48:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:48:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:48:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:48:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:48:29,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:48:29,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:48:29,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:48:29,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:48:29,531 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-28 08:48:29,531 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-28 08:48:29,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:48:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:48:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:48:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:48:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:48:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:48:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:48:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:48:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:48:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:48:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:48:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:48:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:48:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:48:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:48:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:48:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:48:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:48:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:48:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:48:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:48:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:48:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:48:29,536 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:48:29,536 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:48:29,536 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:48:29,536 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:48:29,536 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:48:29,537 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:48:29,537 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:48:29,537 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:48:29,537 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:48:29,537 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:48:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:48:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:48:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:48:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:48:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:48:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:48:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:48:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:48:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:48:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:48:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:48:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:48:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:48:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:48:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:48:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:48:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:48:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:48:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:48:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:48:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:48:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:48:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:48:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:48:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:48:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:48:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:48:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:48:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:48:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:48:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:48:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:48:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:48:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:48:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:48:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:48:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:48:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:48:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:48:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:48:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:48:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:48:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:48:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:48:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:48:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:48:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:48:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:48:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:48:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:48:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:48:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:48:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:48:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:48:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:48:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:48:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:48:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:48:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:48:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:48:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:48:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:48:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:48:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:48:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:48:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:48:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:48:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:48:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:48:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:48:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:48:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:48:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:48:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:48:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:48:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:48:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:48:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:48:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:48:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:48:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:48:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-28 08:48:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:48:29,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:48:29,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:48:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-28 08:48:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:48:29,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:48:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:48:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:48:29,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:48:29,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:48:29,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:48:30,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:48:30,280 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:48:30,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:48:30 BoogieIcfgContainer [2021-10-28 08:48:30,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:48:30,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:48:30,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:48:30,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:48:30,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:48:28" (1/3) ... [2021-10-28 08:48:30,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4337b6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:48:30, skipping insertion in model container [2021-10-28 08:48:30,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:29" (2/3) ... [2021-10-28 08:48:30,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4337b6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:48:30, skipping insertion in model container [2021-10-28 08:48:30,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:48:30" (3/3) ... [2021-10-28 08:48:30,295 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-28 08:48:30,302 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:48:30,302 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 08:48:30,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:48:30,367 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 [2021-10-28 08:48:30,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 08:48:30,382 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) [2021-10-28 08:48:30,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:48:30,390 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:30,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:30,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:30,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-10-28 08:48:30,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:30,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380628903] [2021-10-28 08:48:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:30,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:30,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:30,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:30,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380628903] [2021-10-28 08:48:30,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380628903] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:30,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:30,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:48:30,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547911012] [2021-10-28 08:48:30,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:48:30,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:48:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:48:30,781 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) [2021-10-28 08:48:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:31,071 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-10-28 08:48:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:48:31,074 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 [2021-10-28 08:48:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:31,086 INFO L225 Difference]: With dead ends: 92 [2021-10-28 08:48:31,087 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 08:48:31,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:48:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 08:48:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-28 08:48:31,138 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) [2021-10-28 08:48:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-10-28 08:48:31,145 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-10-28 08:48:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:31,145 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-10-28 08:48:31,146 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) [2021-10-28 08:48:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-10-28 08:48:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:48:31,147 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:31,147 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:31,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:48:31,148 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-10-28 08:48:31,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:31,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515894852] [2021-10-28 08:48:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:31,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:31,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:31,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:31,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515894852] [2021-10-28 08:48:31,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515894852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:31,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:31,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:48:31,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248526721] [2021-10-28 08:48:31,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:31,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:31,401 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) [2021-10-28 08:48:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:31,709 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-10-28 08:48:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:48:31,710 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 [2021-10-28 08:48:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:31,716 INFO L225 Difference]: With dead ends: 91 [2021-10-28 08:48:31,716 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 08:48:31,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:48:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 08:48:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-10-28 08:48:31,732 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) [2021-10-28 08:48:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-10-28 08:48:31,739 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-10-28 08:48:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:31,740 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-10-28 08:48:31,740 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) [2021-10-28 08:48:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-10-28 08:48:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:48:31,742 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:31,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:31,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:48:31,743 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-10-28 08:48:31,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:31,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804347953] [2021-10-28 08:48:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:31,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:31,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:31,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:31,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804347953] [2021-10-28 08:48:31,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804347953] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:31,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:31,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:48:31,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100189314] [2021-10-28 08:48:31,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:31,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:31,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:31,959 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) [2021-10-28 08:48:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:32,304 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-10-28 08:48:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:48:32,306 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 [2021-10-28 08:48:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:32,312 INFO L225 Difference]: With dead ends: 135 [2021-10-28 08:48:32,312 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 08:48:32,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:48:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 08:48:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-10-28 08:48:32,330 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) [2021-10-28 08:48:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-10-28 08:48:32,332 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-10-28 08:48:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:32,334 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-10-28 08:48:32,334 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) [2021-10-28 08:48:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-10-28 08:48:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:48:32,335 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:32,335 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:32,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:48:32,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-10-28 08:48:32,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:32,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122297636] [2021-10-28 08:48:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:32,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:32,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:32,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122297636] [2021-10-28 08:48:32,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122297636] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:32,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:32,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:48:32,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601158632] [2021-10-28 08:48:32,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:32,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:32,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:32,481 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) [2021-10-28 08:48:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:32,716 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-10-28 08:48:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:48:32,718 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 [2021-10-28 08:48:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:32,720 INFO L225 Difference]: With dead ends: 149 [2021-10-28 08:48:32,721 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 08:48:32,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 08:48:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-10-28 08:48:32,734 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) [2021-10-28 08:48:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-10-28 08:48:32,737 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-10-28 08:48:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:32,737 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-10-28 08:48:32,738 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) [2021-10-28 08:48:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-10-28 08:48:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:48:32,739 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:32,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:32,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:48:32,740 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-10-28 08:48:32,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:32,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017020126] [2021-10-28 08:48:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:32,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:32,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:32,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017020126] [2021-10-28 08:48:32,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017020126] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:32,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:32,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:48:32,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026621862] [2021-10-28 08:48:32,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:48:32,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:48:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:48:32,897 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) [2021-10-28 08:48:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:33,288 INFO L93 Difference]: Finished difference Result 197 states and 286 transitions. [2021-10-28 08:48:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:48:33,289 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 [2021-10-28 08:48:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:33,291 INFO L225 Difference]: With dead ends: 197 [2021-10-28 08:48:33,291 INFO L226 Difference]: Without dead ends: 197 [2021-10-28 08:48:33,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:48:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-28 08:48:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-10-28 08:48:33,305 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) [2021-10-28 08:48:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-10-28 08:48:33,310 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 13 [2021-10-28 08:48:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:33,311 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-10-28 08:48:33,311 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) [2021-10-28 08:48:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-10-28 08:48:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:48:33,312 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:33,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:33,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:48:33,313 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-10-28 08:48:33,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:33,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133208719] [2021-10-28 08:48:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:33,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:33,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:33,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:33,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133208719] [2021-10-28 08:48:33,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133208719] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:33,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:33,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:48:33,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246278608] [2021-10-28 08:48:33,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:33,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:33,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:33,459 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) [2021-10-28 08:48:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:33,849 INFO L93 Difference]: Finished difference Result 260 states and 393 transitions. [2021-10-28 08:48:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:48:33,850 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 [2021-10-28 08:48:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:33,853 INFO L225 Difference]: With dead ends: 260 [2021-10-28 08:48:33,854 INFO L226 Difference]: Without dead ends: 260 [2021-10-28 08:48:33,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:48:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-28 08:48:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 233. [2021-10-28 08:48:33,868 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) [2021-10-28 08:48:33,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 366 transitions. [2021-10-28 08:48:33,870 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 366 transitions. Word has length 13 [2021-10-28 08:48:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:33,871 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 366 transitions. [2021-10-28 08:48:33,871 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) [2021-10-28 08:48:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 366 transitions. [2021-10-28 08:48:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:48:33,872 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:33,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:33,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:48:33,873 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:33,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-10-28 08:48:33,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:33,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199815260] [2021-10-28 08:48:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:33,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:33,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:33,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:33,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199815260] [2021-10-28 08:48:33,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199815260] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:33,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:33,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:48:33,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222449120] [2021-10-28 08:48:33,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:33,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:33,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:33,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:33,972 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) [2021-10-28 08:48:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:34,358 INFO L93 Difference]: Finished difference Result 311 states and 476 transitions. [2021-10-28 08:48:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:48:34,360 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 [2021-10-28 08:48:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:34,363 INFO L225 Difference]: With dead ends: 311 [2021-10-28 08:48:34,363 INFO L226 Difference]: Without dead ends: 311 [2021-10-28 08:48:34,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:48:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-28 08:48:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-10-28 08:48:34,375 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) [2021-10-28 08:48:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 450 transitions. [2021-10-28 08:48:34,377 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 450 transitions. Word has length 13 [2021-10-28 08:48:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:34,377 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 450 transitions. [2021-10-28 08:48:34,377 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) [2021-10-28 08:48:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 450 transitions. [2021-10-28 08:48:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:48:34,378 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:34,378 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:34,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:48:34,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-10-28 08:48:34,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:34,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195273295] [2021-10-28 08:48:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:34,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:34,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:34,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195273295] [2021-10-28 08:48:34,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195273295] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:34,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:34,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:48:34,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925843963] [2021-10-28 08:48:34,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:48:34,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:48:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:48:34,469 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) [2021-10-28 08:48:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:34,697 INFO L93 Difference]: Finished difference Result 275 states and 400 transitions. [2021-10-28 08:48:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:48:34,700 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 [2021-10-28 08:48:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:34,703 INFO L225 Difference]: With dead ends: 275 [2021-10-28 08:48:34,703 INFO L226 Difference]: Without dead ends: 275 [2021-10-28 08:48:34,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:48:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-28 08:48:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2021-10-28 08:48:34,723 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) [2021-10-28 08:48:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 362 transitions. [2021-10-28 08:48:34,726 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 362 transitions. Word has length 14 [2021-10-28 08:48:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:34,726 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 362 transitions. [2021-10-28 08:48:34,726 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) [2021-10-28 08:48:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 362 transitions. [2021-10-28 08:48:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:48:34,727 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:34,727 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:34,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:48:34,728 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-10-28 08:48:34,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:34,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274548824] [2021-10-28 08:48:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:34,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:34,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:34,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:34,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274548824] [2021-10-28 08:48:34,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274548824] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:34,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:34,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:48:34,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693274996] [2021-10-28 08:48:34,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:48:34,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:48:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:48:34,826 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) [2021-10-28 08:48:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:35,077 INFO L93 Difference]: Finished difference Result 439 states and 619 transitions. [2021-10-28 08:48:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:48:35,079 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 [2021-10-28 08:48:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:35,083 INFO L225 Difference]: With dead ends: 439 [2021-10-28 08:48:35,083 INFO L226 Difference]: Without dead ends: 439 [2021-10-28 08:48:35,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:48:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-28 08:48:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 409. [2021-10-28 08:48:35,101 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) [2021-10-28 08:48:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 585 transitions. [2021-10-28 08:48:35,105 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 585 transitions. Word has length 15 [2021-10-28 08:48:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:35,105 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 585 transitions. [2021-10-28 08:48:35,105 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) [2021-10-28 08:48:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 585 transitions. [2021-10-28 08:48:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:48:35,107 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:35,107 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:35,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:48:35,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-10-28 08:48:35,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:35,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378521210] [2021-10-28 08:48:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:35,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:35,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:35,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:35,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378521210] [2021-10-28 08:48:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378521210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:35,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740731761] [2021-10-28 08:48:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:35,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:35,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:35,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:48:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:48:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:35,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740731761] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:35,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:35,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-28 08:48:35,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110714782] [2021-10-28 08:48:35,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:48:35,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:48:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:48:35,722 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) [2021-10-28 08:48:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:36,763 INFO L93 Difference]: Finished difference Result 491 states and 695 transitions. [2021-10-28 08:48:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:48:36,764 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 [2021-10-28 08:48:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:36,769 INFO L225 Difference]: With dead ends: 491 [2021-10-28 08:48:36,769 INFO L226 Difference]: Without dead ends: 491 [2021-10-28 08:48:36,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:48:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-28 08:48:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 425. [2021-10-28 08:48:36,813 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) [2021-10-28 08:48:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 593 transitions. [2021-10-28 08:48:36,817 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 593 transitions. Word has length 22 [2021-10-28 08:48:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:36,817 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 593 transitions. [2021-10-28 08:48:36,818 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) [2021-10-28 08:48:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 593 transitions. [2021-10-28 08:48:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:48:36,819 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:36,819 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:36,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:37,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:48:37,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2086418946, now seen corresponding path program 1 times [2021-10-28 08:48:37,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:37,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954305835] [2021-10-28 08:48:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:37,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:37,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:37,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:37,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:37,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954305835] [2021-10-28 08:48:37,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954305835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:37,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248185426] [2021-10-28 08:48:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:37,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:37,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:37,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:37,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:48:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:37,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:48:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:37,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248185426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:37,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:37,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-28 08:48:37,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051425154] [2021-10-28 08:48:37,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:48:37,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:48:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:48:37,613 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) [2021-10-28 08:48:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:38,515 INFO L93 Difference]: Finished difference Result 739 states and 1008 transitions. [2021-10-28 08:48:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:48:38,516 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 [2021-10-28 08:48:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:38,523 INFO L225 Difference]: With dead ends: 739 [2021-10-28 08:48:38,524 INFO L226 Difference]: Without dead ends: 739 [2021-10-28 08:48:38,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:48:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-10-28 08:48:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 642. [2021-10-28 08:48:38,579 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) [2021-10-28 08:48:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 874 transitions. [2021-10-28 08:48:38,585 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 874 transitions. Word has length 24 [2021-10-28 08:48:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:38,591 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 874 transitions. [2021-10-28 08:48:38,591 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) [2021-10-28 08:48:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 874 transitions. [2021-10-28 08:48:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:48:38,601 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:38,602 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:38,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:38,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 08:48:38,813 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash -495871717, now seen corresponding path program 1 times [2021-10-28 08:48:38,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:38,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986000257] [2021-10-28 08:48:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:38,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:39,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:39,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:48:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:48:39,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:39,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986000257] [2021-10-28 08:48:39,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986000257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:39,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119573236] [2021-10-28 08:48:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:39,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:39,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:39,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:39,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:48:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:39,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:48:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:39,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119573236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:39,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:39,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-10-28 08:48:39,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959016784] [2021-10-28 08:48:39,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:48:39,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:48:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:48:39,671 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) [2021-10-28 08:48:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:41,294 INFO L93 Difference]: Finished difference Result 2361 states and 3365 transitions. [2021-10-28 08:48:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:48:41,295 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 [2021-10-28 08:48:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:41,344 INFO L225 Difference]: With dead ends: 2361 [2021-10-28 08:48:41,345 INFO L226 Difference]: Without dead ends: 2361 [2021-10-28 08:48:41,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:48:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-10-28 08:48:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2015. [2021-10-28 08:48:41,441 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) [2021-10-28 08:48:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2795 transitions. [2021-10-28 08:48:41,458 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2795 transitions. Word has length 35 [2021-10-28 08:48:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:41,459 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2795 transitions. [2021-10-28 08:48:41,459 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) [2021-10-28 08:48:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2795 transitions. [2021-10-28 08:48:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:48:41,461 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:41,461 INFO L513 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] [2021-10-28 08:48:41,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:41,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:41,677 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:41,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-10-28 08:48:41,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:41,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410552017] [2021-10-28 08:48:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:41,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:41,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:48:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:48:41,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:41,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410552017] [2021-10-28 08:48:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410552017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:41,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238337547] [2021-10-28 08:48:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:41,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:41,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:41,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:41,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:48:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:42,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:48:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:48:42,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238337547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:42,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:42,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-28 08:48:42,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107409304] [2021-10-28 08:48:42,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:48:42,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:48:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:48:42,386 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) [2021-10-28 08:48:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:43,431 INFO L93 Difference]: Finished difference Result 2783 states and 4061 transitions. [2021-10-28 08:48:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 08:48:43,432 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 [2021-10-28 08:48:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:43,455 INFO L225 Difference]: With dead ends: 2783 [2021-10-28 08:48:43,455 INFO L226 Difference]: Without dead ends: 2783 [2021-10-28 08:48:43,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:48:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-10-28 08:48:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2472. [2021-10-28 08:48:43,578 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) [2021-10-28 08:48:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3472 transitions. [2021-10-28 08:48:43,598 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3472 transitions. Word has length 36 [2021-10-28 08:48:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:43,599 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 3472 transitions. [2021-10-28 08:48:43,600 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) [2021-10-28 08:48:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3472 transitions. [2021-10-28 08:48:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 08:48:43,602 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:43,603 INFO L513 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] [2021-10-28 08:48:43,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:43,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:43,817 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1744987825, now seen corresponding path program 1 times [2021-10-28 08:48:43,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:43,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815994547] [2021-10-28 08:48:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:43,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:43,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:44,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:48:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:48:44,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:44,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815994547] [2021-10-28 08:48:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815994547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:44,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751546086] [2021-10-28 08:48:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:44,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:44,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:44,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:44,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:48:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:44,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 08:48:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:48:44,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751546086] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:44,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:44,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-10-28 08:48:44,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812583584] [2021-10-28 08:48:44,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:48:44,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:48:44,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:48:44,524 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) [2021-10-28 08:48:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:45,659 INFO L93 Difference]: Finished difference Result 2236 states and 3085 transitions. [2021-10-28 08:48:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 08:48:45,660 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 [2021-10-28 08:48:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:45,676 INFO L225 Difference]: With dead ends: 2236 [2021-10-28 08:48:45,676 INFO L226 Difference]: Without dead ends: 2120 [2021-10-28 08:48:45,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:48:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-10-28 08:48:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1825. [2021-10-28 08:48:45,759 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) [2021-10-28 08:48:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2506 transitions. [2021-10-28 08:48:45,774 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2506 transitions. Word has length 38 [2021-10-28 08:48:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:45,776 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2506 transitions. [2021-10-28 08:48:45,776 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) [2021-10-28 08:48:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2506 transitions. [2021-10-28 08:48:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:48:45,778 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:45,778 INFO L513 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] [2021-10-28 08:48:45,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:46,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 08:48:46,005 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-10-28 08:48:46,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:46,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73321550] [2021-10-28 08:48:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:46,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:46,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:46,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:46,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:48:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:46,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:48:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 08:48:46,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:46,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73321550] [2021-10-28 08:48:46,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73321550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:46,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346082242] [2021-10-28 08:48:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:46,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:46,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:46,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:48:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:48:46,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:48:46,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346082242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:46,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:46,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-28 08:48:46,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943595548] [2021-10-28 08:48:46,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:48:46,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:48:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:48:46,777 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) [2021-10-28 08:48:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:48,059 INFO L93 Difference]: Finished difference Result 3248 states and 4600 transitions. [2021-10-28 08:48:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:48:48,060 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 [2021-10-28 08:48:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:48,084 INFO L225 Difference]: With dead ends: 3248 [2021-10-28 08:48:48,085 INFO L226 Difference]: Without dead ends: 3248 [2021-10-28 08:48:48,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:48:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-10-28 08:48:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2632. [2021-10-28 08:48:48,189 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) [2021-10-28 08:48:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3608 transitions. [2021-10-28 08:48:48,204 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3608 transitions. Word has length 47 [2021-10-28 08:48:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:48,205 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 3608 transitions. [2021-10-28 08:48:48,205 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) [2021-10-28 08:48:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3608 transitions. [2021-10-28 08:48:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 08:48:48,208 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:48,208 INFO L513 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] [2021-10-28 08:48:48,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:48,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:48:48,425 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-10-28 08:48:48,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:48,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409535622] [2021-10-28 08:48:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:48,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:48,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:48,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:48,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:48:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:48,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:48:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:48,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:48:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 08:48:48,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:48,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409535622] [2021-10-28 08:48:48,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409535622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:48,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705893262] [2021-10-28 08:48:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:48,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:48,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:48,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:48,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:48:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:48:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 08:48:49,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705893262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:49,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:49,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-10-28 08:48:49,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811731491] [2021-10-28 08:48:49,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:48:49,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:49,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:48:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:48:49,194 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) [2021-10-28 08:48:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:49,878 INFO L93 Difference]: Finished difference Result 3687 states and 5274 transitions. [2021-10-28 08:48:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:48:49,879 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 [2021-10-28 08:48:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:49,905 INFO L225 Difference]: With dead ends: 3687 [2021-10-28 08:48:49,905 INFO L226 Difference]: Without dead ends: 3687 [2021-10-28 08:48:49,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:48:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-10-28 08:48:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2678. [2021-10-28 08:48:50,048 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) [2021-10-28 08:48:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3677 transitions. [2021-10-28 08:48:50,060 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3677 transitions. Word has length 58 [2021-10-28 08:48:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:50,061 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3677 transitions. [2021-10-28 08:48:50,061 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) [2021-10-28 08:48:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3677 transitions. [2021-10-28 08:48:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:48:50,063 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:50,064 INFO L513 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] [2021-10-28 08:48:50,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:50,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:48:50,285 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:50,285 INFO L85 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-10-28 08:48:50,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:50,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554080044] [2021-10-28 08:48:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:50,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:50,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:48:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:50,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:48:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:50,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:48:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:50,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-28 08:48:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:50,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-28 08:48:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:48:50,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:50,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554080044] [2021-10-28 08:48:50,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554080044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:50,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121197573] [2021-10-28 08:48:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:50,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:50,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:50,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:48:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:48:50,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 08:48:51,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121197573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:51,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:51,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-28 08:48:51,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909031705] [2021-10-28 08:48:51,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:48:51,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:48:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:48:51,232 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) [2021-10-28 08:49:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:00,224 INFO L93 Difference]: Finished difference Result 10210 states and 14276 transitions. [2021-10-28 08:49:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-10-28 08:49:00,225 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 [2021-10-28 08:49:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:00,302 INFO L225 Difference]: With dead ends: 10210 [2021-10-28 08:49:00,302 INFO L226 Difference]: Without dead ends: 10035 [2021-10-28 08:49:00,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-10-28 08:49:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2021-10-28 08:49:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 8947. [2021-10-28 08:49:00,697 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) [2021-10-28 08:49:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8947 states to 8947 states and 12420 transitions. [2021-10-28 08:49:00,840 INFO L78 Accepts]: Start accepts. Automaton has 8947 states and 12420 transitions. Word has length 60 [2021-10-28 08:49:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:00,841 INFO L470 AbstractCegarLoop]: Abstraction has 8947 states and 12420 transitions. [2021-10-28 08:49:00,842 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) [2021-10-28 08:49:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 8947 states and 12420 transitions. [2021-10-28 08:49:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:49:00,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:00,845 INFO L513 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] [2021-10-28 08:49:00,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:01,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:49:01,059 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:01,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-10-28 08:49:01,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:01,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579307648] [2021-10-28 08:49:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:01,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:01,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:01,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:01,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 08:49:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 08:49:01,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:01,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579307648] [2021-10-28 08:49:01,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579307648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:01,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425157254] [2021-10-28 08:49:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:01,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:01,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:01,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:49:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:49:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 08:49:01,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425157254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:01,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:01,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-10-28 08:49:01,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080289001] [2021-10-28 08:49:01,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 08:49:01,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 08:49:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:49:01,993 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) [2021-10-28 08:49:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:03,844 INFO L93 Difference]: Finished difference Result 18386 states and 26465 transitions. [2021-10-28 08:49:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 08:49:03,845 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 [2021-10-28 08:49:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:03,946 INFO L225 Difference]: With dead ends: 18386 [2021-10-28 08:49:03,946 INFO L226 Difference]: Without dead ends: 18386 [2021-10-28 08:49:03,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 08:49:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18386 states. [2021-10-28 08:49:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18386 to 14298. [2021-10-28 08:49:04,646 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) [2021-10-28 08:49:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14298 states to 14298 states and 20089 transitions. [2021-10-28 08:49:04,708 INFO L78 Accepts]: Start accepts. Automaton has 14298 states and 20089 transitions. Word has length 60 [2021-10-28 08:49:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:04,710 INFO L470 AbstractCegarLoop]: Abstraction has 14298 states and 20089 transitions. [2021-10-28 08:49:04,710 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) [2021-10-28 08:49:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14298 states and 20089 transitions. [2021-10-28 08:49:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 08:49:04,716 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:04,716 INFO L513 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] [2021-10-28 08:49:04,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-28 08:49:04,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:49:04,945 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-10-28 08:49:04,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:04,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973062892] [2021-10-28 08:49:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:04,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:49:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-28 08:49:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-28 08:49:05,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:05,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973062892] [2021-10-28 08:49:05,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973062892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:05,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326026164] [2021-10-28 08:49:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:05,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:05,337 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:05,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:49:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:49:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-28 08:49:06,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326026164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:06,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:06,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-10-28 08:49:06,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079462682] [2021-10-28 08:49:06,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:49:06,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:49:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:49:06,066 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) [2021-10-28 08:49:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:08,146 INFO L93 Difference]: Finished difference Result 18457 states and 26048 transitions. [2021-10-28 08:49:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 08:49:08,147 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 [2021-10-28 08:49:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:08,234 INFO L225 Difference]: With dead ends: 18457 [2021-10-28 08:49:08,235 INFO L226 Difference]: Without dead ends: 18282 [2021-10-28 08:49:08,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 08:49:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2021-10-28 08:49:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 17261. [2021-10-28 08:49:08,827 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) [2021-10-28 08:49:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-28 08:49:08,876 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 71 [2021-10-28 08:49:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:08,876 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-28 08:49:08,876 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) [2021-10-28 08:49:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-28 08:49:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 08:49:08,882 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:08,882 INFO L513 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] [2021-10-28 08:49:08,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:09,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:09,109 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:09,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-10-28 08:49:09,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:09,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650166026] [2021-10-28 08:49:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:09,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:49:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-10-28 08:49:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-10-28 08:49:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-28 08:49:09,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:09,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650166026] [2021-10-28 08:49:09,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650166026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:09,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046493320] [2021-10-28 08:49:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:09,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:09,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:09,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:49:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:49:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 08:49:10,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046493320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:10,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:10,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-10-28 08:49:10,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150375236] [2021-10-28 08:49:10,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:49:10,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:10,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:49:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:49:10,003 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) [2021-10-28 08:49:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:11,060 INFO L93 Difference]: Finished difference Result 22712 states and 32588 transitions. [2021-10-28 08:49:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 08:49:11,061 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 [2021-10-28 08:49:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:11,159 INFO L225 Difference]: With dead ends: 22712 [2021-10-28 08:49:11,159 INFO L226 Difference]: Without dead ends: 22712 [2021-10-28 08:49:11,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:49:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2021-10-28 08:49:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 17261. [2021-10-28 08:49:11,825 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) [2021-10-28 08:49:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-28 08:49:11,893 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 82 [2021-10-28 08:49:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:11,893 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-28 08:49:11,894 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) [2021-10-28 08:49:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-28 08:49:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 08:49:11,906 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:11,907 INFO L513 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] [2021-10-28 08:49:11,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:12,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:12,121 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-10-28 08:49:12,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:12,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689940781] [2021-10-28 08:49:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:12,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 08:49:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-28 08:49:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-10-28 08:49:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 08:49:12,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:12,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689940781] [2021-10-28 08:49:12,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689940781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:12,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591491885] [2021-10-28 08:49:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:12,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:12,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:12,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:12,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:49:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:49:13,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 08:49:13,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591491885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:13,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:13,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-28 08:49:13,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591881896] [2021-10-28 08:49:13,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:49:13,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:49:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:49:13,875 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) [2021-10-28 08:49:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:18,630 INFO L93 Difference]: Finished difference Result 27778 states and 39484 transitions. [2021-10-28 08:49:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-28 08:49:18,631 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 [2021-10-28 08:49:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:18,746 INFO L225 Difference]: With dead ends: 27778 [2021-10-28 08:49:18,746 INFO L226 Difference]: Without dead ends: 26524 [2021-10-28 08:49:18,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 08:49:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2021-10-28 08:49:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17896. [2021-10-28 08:49:19,412 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) [2021-10-28 08:49:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17896 states to 17896 states and 24984 transitions. [2021-10-28 08:49:19,471 INFO L78 Accepts]: Start accepts. Automaton has 17896 states and 24984 transitions. Word has length 84 [2021-10-28 08:49:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:19,472 INFO L470 AbstractCegarLoop]: Abstraction has 17896 states and 24984 transitions. [2021-10-28 08:49:19,472 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) [2021-10-28 08:49:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 17896 states and 24984 transitions. [2021-10-28 08:49:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 08:49:19,478 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:19,478 INFO L513 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] [2021-10-28 08:49:19,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:19,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:19,705 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-10-28 08:49:19,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:19,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927170178] [2021-10-28 08:49:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:19,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:49:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-28 08:49:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 08:49:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-28 08:49:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:19,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927170178] [2021-10-28 08:49:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927170178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:19,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824512401] [2021-10-28 08:49:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:19,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:19,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:19,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:49:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:20,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:49:20,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-28 08:49:20,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824512401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:20,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:20,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-28 08:49:20,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556732534] [2021-10-28 08:49:20,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:49:20,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:49:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:49:20,727 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) [2021-10-28 08:49:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:22,300 INFO L93 Difference]: Finished difference Result 14807 states and 19651 transitions. [2021-10-28 08:49:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 08:49:22,303 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 [2021-10-28 08:49:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:22,357 INFO L225 Difference]: With dead ends: 14807 [2021-10-28 08:49:22,358 INFO L226 Difference]: Without dead ends: 13835 [2021-10-28 08:49:22,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 08:49:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2021-10-28 08:49:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 13300. [2021-10-28 08:49:22,740 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) [2021-10-28 08:49:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13300 states to 13300 states and 17719 transitions. [2021-10-28 08:49:22,786 INFO L78 Accepts]: Start accepts. Automaton has 13300 states and 17719 transitions. Word has length 84 [2021-10-28 08:49:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:22,786 INFO L470 AbstractCegarLoop]: Abstraction has 13300 states and 17719 transitions. [2021-10-28 08:49:22,786 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) [2021-10-28 08:49:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 13300 states and 17719 transitions. [2021-10-28 08:49:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 08:49:22,790 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:22,790 INFO L513 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] [2021-10-28 08:49:22,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:23,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:23,005 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-10-28 08:49:23,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:23,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829204518] [2021-10-28 08:49:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:23,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:49:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 08:49:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-28 08:49:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 38 proven. 67 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-28 08:49:23,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:23,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829204518] [2021-10-28 08:49:23,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829204518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:23,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607608687] [2021-10-28 08:49:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:23,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:23,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:23,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:49:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:23,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 08:49:23,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 65 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-28 08:49:24,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607608687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:24,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:24,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-10-28 08:49:24,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490572864] [2021-10-28 08:49:24,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:49:24,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:49:24,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:49:24,106 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) [2021-10-28 08:49:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:25,098 INFO L93 Difference]: Finished difference Result 13075 states and 17272 transitions. [2021-10-28 08:49:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 08:49:25,099 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 [2021-10-28 08:49:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:25,142 INFO L225 Difference]: With dead ends: 13075 [2021-10-28 08:49:25,142 INFO L226 Difference]: Without dead ends: 13075 [2021-10-28 08:49:25,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:49:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13075 states. [2021-10-28 08:49:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13075 to 12880. [2021-10-28 08:49:25,540 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) [2021-10-28 08:49:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12880 states to 12880 states and 17072 transitions. [2021-10-28 08:49:25,577 INFO L78 Accepts]: Start accepts. Automaton has 12880 states and 17072 transitions. Word has length 85 [2021-10-28 08:49:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:25,578 INFO L470 AbstractCegarLoop]: Abstraction has 12880 states and 17072 transitions. [2021-10-28 08:49:25,578 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) [2021-10-28 08:49:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 12880 states and 17072 transitions. [2021-10-28 08:49:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 08:49:25,582 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:25,582 INFO L513 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] [2021-10-28 08:49:25,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:25,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 08:49:25,805 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1378069754, now seen corresponding path program 1 times [2021-10-28 08:49:25,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:25,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951241293] [2021-10-28 08:49:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:25,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:25,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:25,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:25,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:25,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:49:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:26,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 08:49:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:26,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-10-28 08:49:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-28 08:49:26,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:26,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951241293] [2021-10-28 08:49:26,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951241293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:26,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416323411] [2021-10-28 08:49:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:26,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:26,089 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:26,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:49:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:49:26,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 08:49:27,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416323411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:27,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:27,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-10-28 08:49:27,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259113871] [2021-10-28 08:49:27,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:49:27,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:49:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:49:27,146 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) [2021-10-28 08:49:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:28,673 INFO L93 Difference]: Finished difference Result 20786 states and 27151 transitions. [2021-10-28 08:49:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 08:49:28,674 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 [2021-10-28 08:49:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:28,747 INFO L225 Difference]: With dead ends: 20786 [2021-10-28 08:49:28,747 INFO L226 Difference]: Without dead ends: 19891 [2021-10-28 08:49:28,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 08:49:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19891 states. [2021-10-28 08:49:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19891 to 18204. [2021-10-28 08:49:29,149 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) [2021-10-28 08:49:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18204 states to 18204 states and 23983 transitions. [2021-10-28 08:49:29,204 INFO L78 Accepts]: Start accepts. Automaton has 18204 states and 23983 transitions. Word has length 86 [2021-10-28 08:49:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:29,204 INFO L470 AbstractCegarLoop]: Abstraction has 18204 states and 23983 transitions. [2021-10-28 08:49:29,205 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) [2021-10-28 08:49:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 18204 states and 23983 transitions. [2021-10-28 08:49:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 08:49:29,209 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:29,209 INFO L513 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] [2021-10-28 08:49:29,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:29,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 08:49:29,425 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash -616739140, now seen corresponding path program 1 times [2021-10-28 08:49:29,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:29,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984681258] [2021-10-28 08:49:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:29,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-28 08:49:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-10-28 08:49:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 08:49:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 70 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-28 08:49:29,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:29,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984681258] [2021-10-28 08:49:29,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984681258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:29,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171775315] [2021-10-28 08:49:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:29,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:29,717 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:29,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:49:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:30,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 08:49:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 108 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 08:49:30,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171775315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:30,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:30,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-28 08:49:30,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005916100] [2021-10-28 08:49:30,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:49:30,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:49:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:49:30,834 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) [2021-10-28 08:49:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:33,209 INFO L93 Difference]: Finished difference Result 13417 states and 17122 transitions. [2021-10-28 08:49:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 08:49:33,211 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 [2021-10-28 08:49:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:33,243 INFO L225 Difference]: With dead ends: 13417 [2021-10-28 08:49:33,244 INFO L226 Difference]: Without dead ends: 12804 [2021-10-28 08:49:33,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 08:49:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12804 states. [2021-10-28 08:49:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12804 to 12620. [2021-10-28 08:49:33,579 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) [2021-10-28 08:49:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12620 states to 12620 states and 16331 transitions. [2021-10-28 08:49:33,625 INFO L78 Accepts]: Start accepts. Automaton has 12620 states and 16331 transitions. Word has length 92 [2021-10-28 08:49:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:33,626 INFO L470 AbstractCegarLoop]: Abstraction has 12620 states and 16331 transitions. [2021-10-28 08:49:33,626 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) [2021-10-28 08:49:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12620 states and 16331 transitions. [2021-10-28 08:49:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 08:49:33,631 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:33,631 INFO L513 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] [2021-10-28 08:49:33,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:33,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:33,857 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 259058990, now seen corresponding path program 1 times [2021-10-28 08:49:33,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:33,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166349638] [2021-10-28 08:49:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:33,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:49:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 08:49:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-28 08:49:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-28 08:49:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 80 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-28 08:49:34,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166349638] [2021-10-28 08:49:34,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166349638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:34,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693177504] [2021-10-28 08:49:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:34,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:34,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:34,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:34,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:49:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-28 08:49:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 108 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-28 08:49:35,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693177504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:35,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:35,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-10-28 08:49:35,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298758825] [2021-10-28 08:49:35,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 08:49:35,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 08:49:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:49:35,863 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) [2021-10-28 08:49:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:42,787 INFO L93 Difference]: Finished difference Result 21726 states and 27863 transitions. [2021-10-28 08:49:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-28 08:49:42,788 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 [2021-10-28 08:49:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:42,863 INFO L225 Difference]: With dead ends: 21726 [2021-10-28 08:49:42,864 INFO L226 Difference]: Without dead ends: 21592 [2021-10-28 08:49:42,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1246, Invalid=5726, Unknown=0, NotChecked=0, Total=6972 [2021-10-28 08:49:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21592 states. [2021-10-28 08:49:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21592 to 20891. [2021-10-28 08:49:43,376 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) [2021-10-28 08:49:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20891 states to 20891 states and 26869 transitions. [2021-10-28 08:49:43,447 INFO L78 Accepts]: Start accepts. Automaton has 20891 states and 26869 transitions. Word has length 95 [2021-10-28 08:49:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:43,448 INFO L470 AbstractCegarLoop]: Abstraction has 20891 states and 26869 transitions. [2021-10-28 08:49:43,448 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) [2021-10-28 08:49:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 20891 states and 26869 transitions. [2021-10-28 08:49:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 08:49:43,456 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:43,457 INFO L513 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] [2021-10-28 08:49:43,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:43,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:43,673 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:43,673 INFO L85 PathProgramCache]: Analyzing trace with hash 756702157, now seen corresponding path program 1 times [2021-10-28 08:49:43,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:43,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185567094] [2021-10-28 08:49:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:43,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:43,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:43,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:49:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:43,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:43,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:49:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:43,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:49:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:43,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-28 08:49:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:44,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-28 08:49:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:44,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-28 08:49:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:44,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-10-28 08:49:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-10-28 08:49:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-10-28 08:49:44,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:44,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185567094] [2021-10-28 08:49:44,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185567094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:44,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825518257] [2021-10-28 08:49:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:44,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:44,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:44,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:44,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:49:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 08:49:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 91 proven. 62 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-10-28 08:49:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825518257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:45,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:45,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-28 08:49:45,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758567453] [2021-10-28 08:49:45,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:49:45,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:45,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:49:45,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:49:45,090 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) [2021-10-28 08:49:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:47,597 INFO L93 Difference]: Finished difference Result 26244 states and 33478 transitions. [2021-10-28 08:49:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 08:49:47,597 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 [2021-10-28 08:49:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:47,677 INFO L225 Difference]: With dead ends: 26244 [2021-10-28 08:49:47,677 INFO L226 Difference]: Without dead ends: 26082 [2021-10-28 08:49:47,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 08:49:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26082 states. [2021-10-28 08:49:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26082 to 25019. [2021-10-28 08:49:48,167 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) [2021-10-28 08:49:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25019 states to 25019 states and 31982 transitions. [2021-10-28 08:49:48,247 INFO L78 Accepts]: Start accepts. Automaton has 25019 states and 31982 transitions. Word has length 118 [2021-10-28 08:49:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:48,248 INFO L470 AbstractCegarLoop]: Abstraction has 25019 states and 31982 transitions. [2021-10-28 08:49:48,248 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) [2021-10-28 08:49:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25019 states and 31982 transitions. [2021-10-28 08:49:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-28 08:49:48,259 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:48,260 INFO L513 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] [2021-10-28 08:49:48,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:48,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:48,485 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -607088145, now seen corresponding path program 1 times [2021-10-28 08:49:48,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:48,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503892878] [2021-10-28 08:49:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:48,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:49:48,595 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:49:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:49:48,865 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:49:48,865 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:49:48,866 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:49:48,870 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-28 08:49:48,884 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-28 08:49:48,885 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-28 08:49:48,885 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-28 08:49:48,885 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-28 08:49:48,885 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-28 08:49:48,886 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-28 08:49:48,886 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-28 08:49:48,886 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-28 08:49:48,886 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-28 08:49:48,886 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-28 08:49:48,887 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-28 08:49:48,887 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-28 08:49:48,887 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-28 08:49:48,887 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:49:48,887 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:49:48,888 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:48,888 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:48,888 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:48,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 08:49:48,893 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:48,898 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:49:49,042 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:49:49,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:49:49 BoogieIcfgContainer [2021-10-28 08:49:49,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:49:49,222 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:49:49,222 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:49:49,222 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:49:49,223 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:48:30" (3/4) ... [2021-10-28 08:49:49,226 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:49:49,228 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:49:49,244 INFO L168 Benchmark]: Toolchain (without parser) took 80948.61 ms. Allocated memory was 73.4 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 42.9 MB in the beginning and 1.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 757.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:49,245 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 44.0 MB in the beginning and 44.0 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:49:49,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1061.69 ms. Allocated memory is still 73.4 MB. Free memory was 42.6 MB in the beginning and 41.7 MB in the end (delta: 901.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:49,246 INFO L168 Benchmark]: Boogie Preprocessor took 93.32 ms. Allocated memory is still 73.4 MB. Free memory was 41.7 MB in the beginning and 38.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:49,247 INFO L168 Benchmark]: RCFGBuilder took 830.32 ms. Allocated memory was 73.4 MB in the beginning and 96.5 MB in the end (delta: 23.1 MB). Free memory was 38.9 MB in the beginning and 56.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:49,247 INFO L168 Benchmark]: TraceAbstraction took 78933.98 ms. Allocated memory was 96.5 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 55.8 MB in the beginning and 1.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 744.8 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:49,248 INFO L168 Benchmark]: Witness Printer took 7.04 ms. Allocated memory is still 2.2 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:49,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 44.0 MB in the beginning and 44.0 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1061.69 ms. Allocated memory is still 73.4 MB. Free memory was 42.6 MB in the beginning and 41.7 MB in the end (delta: 901.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.32 ms. Allocated memory is still 73.4 MB. Free memory was 41.7 MB in the beginning and 38.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 830.32 ms. Allocated memory was 73.4 MB in the beginning and 96.5 MB in the end (delta: 23.1 MB). Free memory was 38.9 MB in the beginning and 56.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 78933.98 ms. Allocated memory was 96.5 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 55.8 MB in the beginning and 1.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 744.8 MB. Max. memory is 16.1 GB. * Witness Printer took 7.04 ms. Allocated memory is still 2.2 GB. Free memory was 1.4 GB in the beginning and 1.4 GB 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=54, \old(garbage)=49, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=57, \old(S)=55, \old(t1)=62, \old(t1)=70, \old(t4)=53, \old(t4)=58, \old(x1)=74, \old(x1)=61, \old(x4)=68, \old(x4)=51, 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)=-1, \old(x1)=0, \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)=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}] [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)=0, \old(x1)=-1, \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)=-1, \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}] [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)=-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=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)=-1, \old(t4)=0, \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)=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, 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)=-1, \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}] [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)=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=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)=-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={-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)=-1, \old(x1)=0, \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: 78.5s, OverallIterations: 28, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 46.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2610 SDtfs, 9650 SDslu, 6262 SDs, 0 SdLazy, 21611 SolverSat, 3963 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2366 GetRequests, 1507 SyntacticMatches, 6 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 27.0s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 7.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 27612 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 12.3s 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 [2021-10-28 08:49:49,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:49:52,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:49:52,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:49:52,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:49:52,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:49:52,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:49:52,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:49:52,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:49:52,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:49:52,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:49:52,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:49:52,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:49:52,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:49:52,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:49:52,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:49:52,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:49:52,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:49:52,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:49:52,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:49:52,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:49:52,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:49:52,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:49:52,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:49:52,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:49:52,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:49:52,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:49:52,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:49:52,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:49:52,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:49:52,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:49:52,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:49:52,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:49:52,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:49:52,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:49:52,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:49:52,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:49:52,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:49:52,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:49:52,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:49:52,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:49:52,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:49:52,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 08:49:52,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:49:52,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:49:52,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:49:52,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:49:52,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:49:52,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:49:52,190 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:49:52,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:49:52,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:49:52,191 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:49:52,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:49:52,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:49:52,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:49:52,192 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:49:52,192 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:49:52,193 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:49:52,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:49:52,193 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:49:52,193 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 08:49:52,194 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 08:49:52,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:49:52,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:49:52,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:49:52,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:49:52,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:49:52,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:49:52,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:49:52,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:49:52,196 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 08:49:52,196 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 08:49:52,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:49:52,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 08:49:52,197 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_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-10-28 08:49:52,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:49:52,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:49:52,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:49:52,628 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:49:52,629 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:49:52,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 08:49:52,713 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/29820b126/477cf6abcccd411089d89c7e3406f3f8/FLAG65963f643 [2021-10-28 08:49:53,571 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:49:53,573 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-28 08:49:53,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/29820b126/477cf6abcccd411089d89c7e3406f3f8/FLAG65963f643 [2021-10-28 08:49:53,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/data/29820b126/477cf6abcccd411089d89c7e3406f3f8 [2021-10-28 08:49:53,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:49:53,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:49:53,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:49:53,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:49:53,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:49:53,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:49:53" (1/1) ... [2021-10-28 08:49:53,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d97febb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:53, skipping insertion in model container [2021-10-28 08:49:53,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:49:53" (1/1) ... [2021-10-28 08:49:53,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:49:53,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:49:54,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:49:54,067 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:49:54,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:49:54,189 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:49:54,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54 WrapperNode [2021-10-28 08:49:54,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:49:54,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:49:54,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:49:54,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:49:54,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:49:54,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:49:54,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:49:54,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:49:54,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (1/1) ... [2021-10-28 08:49:54,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:49:54,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:54,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:49:54,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:49:54,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:49:54,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:49:54,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 08:49:54,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:49:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:49:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:49:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:49:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:49:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:49:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-28 08:49:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-28 08:49:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:49:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:49:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:49:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:49:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:49:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:49:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:49:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:49:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:49:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:49:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:49:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:49:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:49:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:49:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:49:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:49:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:49:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:49:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:49:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:49:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:49:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:49:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:49:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:49:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:49:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:49:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:49:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:49:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:49:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:49:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:49:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:49:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:49:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:49:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:49:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:49:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:49:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:49:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:49:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:49:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:49:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:49:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:49:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:49:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:49:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:49:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:49:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:49:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:49:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:49:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:49:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:49:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:49:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:49:54,442 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:49:54,442 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:49:54,442 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:49:54,442 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:49:54,442 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:49:54,442 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:49:54,443 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:49:54,443 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:49:54,443 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:49:54,443 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:49:54,443 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:49:54,444 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:49:54,444 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:49:54,444 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:49:54,444 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:49:54,444 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:49:54,444 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:49:54,445 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:49:54,445 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:49:54,445 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:49:54,445 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:49:54,445 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:49:54,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:49:54,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:49:54,446 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:49:54,446 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:49:54,446 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:49:54,446 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:49:54,447 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:49:54,447 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:49:54,447 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:49:54,447 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:49:54,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:49:54,450 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:49:54,450 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:49:54,450 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:49:54,450 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:49:54,450 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:49:54,450 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:49:54,451 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:49:54,451 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:49:54,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:49:54,451 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-28 08:49:54,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:49:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 08:49:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:49:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-28 08:49:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:49:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 08:49:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:49:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:49:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:49:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 08:49:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:49:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 08:49:54,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 08:49:54,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 08:49:55,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:49:55,366 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:49:55,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:55 BoogieIcfgContainer [2021-10-28 08:49:55,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:49:55,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:49:55,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:49:55,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:49:55,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:49:53" (1/3) ... [2021-10-28 08:49:55,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac80f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:49:55, skipping insertion in model container [2021-10-28 08:49:55,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:54" (2/3) ... [2021-10-28 08:49:55,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac80f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:49:55, skipping insertion in model container [2021-10-28 08:49:55,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:55" (3/3) ... [2021-10-28 08:49:55,381 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-28 08:49:55,387 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:49:55,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 08:49:55,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:49:55,449 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 [2021-10-28 08:49:55,450 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 08:49:55,468 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) [2021-10-28 08:49:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:49:55,480 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:55,481 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:55,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:55,493 INFO L85 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-10-28 08:49:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:55,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069447480] [2021-10-28 08:49:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:55,509 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:55,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:55,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 08:49:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 08:49:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:55,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:49:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:55,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:49:55,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069447480] [2021-10-28 08:49:55,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069447480] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:49:55,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:49:55,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:49:55,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005353406] [2021-10-28 08:49:55,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:49:55,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:49:55,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:49:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:49:55,890 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) [2021-10-28 08:49:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:55,911 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-28 08:49:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:49:55,913 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 [2021-10-28 08:49:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:55,925 INFO L225 Difference]: With dead ends: 72 [2021-10-28 08:49:55,925 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 08:49:55,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:49:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 08:49:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 08:49:55,966 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) [2021-10-28 08:49:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-10-28 08:49:55,970 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-10-28 08:49:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:55,970 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-10-28 08:49:55,971 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) [2021-10-28 08:49:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-10-28 08:49:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:49:55,972 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:55,972 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:55,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-28 08:49:56,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:49:56,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-10-28 08:49:56,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:56,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399061325] [2021-10-28 08:49:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:56,191 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:56,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:56,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:56,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 08:49:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:49:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:56,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:49:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:57,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:49:57,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399061325] [2021-10-28 08:49:57,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399061325] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:49:57,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:49:57,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 08:49:57,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85877186] [2021-10-28 08:49:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:49:57,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:49:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:49:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:49:57,065 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) [2021-10-28 08:49:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:57,198 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-10-28 08:49:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:49:57,200 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 [2021-10-28 08:49:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:57,205 INFO L225 Difference]: With dead ends: 120 [2021-10-28 08:49:57,206 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 08:49:57,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:49:57,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 08:49:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-10-28 08:49:57,259 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) [2021-10-28 08:49:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-10-28 08:49:57,282 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-10-28 08:49:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:57,283 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-10-28 08:49:57,284 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) [2021-10-28 08:49:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-10-28 08:49:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:49:57,290 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:57,290 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:57,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:57,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:49:57,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-10-28 08:49:57,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:57,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789613664] [2021-10-28 08:49:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:57,507 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:57,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:57,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 08:49:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 08:49:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:57,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:49:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:57,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:49:57,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789613664] [2021-10-28 08:49:57,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789613664] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:49:57,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:49:57,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:49:57,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787843285] [2021-10-28 08:49:57,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:49:57,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:49:57,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:49:57,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:49:57,947 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) [2021-10-28 08:49:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:58,192 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-10-28 08:49:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:49:58,194 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 [2021-10-28 08:49:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:58,197 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:49:58,197 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 08:49:58,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:49:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 08:49:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-10-28 08:49:58,229 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) [2021-10-28 08:49:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-10-28 08:49:58,248 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-10-28 08:49:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:58,249 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-10-28 08:49:58,249 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) [2021-10-28 08:49:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-10-28 08:49:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:49:58,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:58,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:58,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:58,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:49:58,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:58,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-10-28 08:49:58,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:58,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542229448] [2021-10-28 08:49:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:58,466 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:58,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:58,469 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:58,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 08:49:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:58,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 08:49:58,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:58,932 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 [2021-10-28 08:49:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:49:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:59,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:49:59,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542229448] [2021-10-28 08:49:59,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542229448] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:49:59,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:49:59,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:49:59,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060230219] [2021-10-28 08:49:59,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:49:59,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:49:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:49:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:49:59,017 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) [2021-10-28 08:49:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:59,346 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-10-28 08:49:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:49:59,350 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 [2021-10-28 08:49:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:59,353 INFO L225 Difference]: With dead ends: 198 [2021-10-28 08:49:59,353 INFO L226 Difference]: Without dead ends: 198 [2021-10-28 08:49:59,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:49:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-28 08:49:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-28 08:49:59,411 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) [2021-10-28 08:49:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-10-28 08:49:59,431 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-10-28 08:49:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:59,431 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-10-28 08:49:59,432 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) [2021-10-28 08:49:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-10-28 08:49:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:49:59,433 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:59,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:59,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:59,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:49:59,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:49:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-10-28 08:49:59,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:59,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272753747] [2021-10-28 08:49:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:59,651 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:59,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:59,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:59,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 08:49:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:59,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:49:59,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:59,980 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 [2021-10-28 08:49:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:59,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:00,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:00,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272753747] [2021-10-28 08:50:00,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272753747] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:50:00,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:50:00,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-28 08:50:00,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584821737] [2021-10-28 08:50:00,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:50:00,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:50:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:50:00,094 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) [2021-10-28 08:50:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:00,452 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-10-28 08:50:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:50:00,454 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 [2021-10-28 08:50:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:00,458 INFO L225 Difference]: With dead ends: 333 [2021-10-28 08:50:00,459 INFO L226 Difference]: Without dead ends: 333 [2021-10-28 08:50:00,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:50:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-10-28 08:50:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-10-28 08:50:00,486 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) [2021-10-28 08:50:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-10-28 08:50:00,490 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-10-28 08:50:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:00,490 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-10-28 08:50:00,490 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) [2021-10-28 08:50:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-10-28 08:50:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:50:00,492 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:00,492 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:00,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:00,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:00,710 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-10-28 08:50:00,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:00,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144836968] [2021-10-28 08:50:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:00,712 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:00,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:00,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:00,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 08:50:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:01,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:50:01,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:01,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:01,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:01,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144836968] [2021-10-28 08:50:01,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144836968] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:50:01,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:50:01,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 08:50:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778837397] [2021-10-28 08:50:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:50:01,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:50:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:50:01,172 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) [2021-10-28 08:50:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:01,228 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-10-28 08:50:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:50:01,229 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 [2021-10-28 08:50:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:01,235 INFO L225 Difference]: With dead ends: 197 [2021-10-28 08:50:01,235 INFO L226 Difference]: Without dead ends: 197 [2021-10-28 08:50:01,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:50:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-28 08:50:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-10-28 08:50:01,270 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) [2021-10-28 08:50:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-10-28 08:50:01,273 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-10-28 08:50:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:01,273 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-10-28 08:50:01,273 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) [2021-10-28 08:50:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-10-28 08:50:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:50:01,275 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:01,275 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:01,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:01,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:01,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-10-28 08:50:01,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:01,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413591835] [2021-10-28 08:50:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:01,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:01,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:01,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 08:50:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:50:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:01,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:02,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:02,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413591835] [2021-10-28 08:50:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413591835] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:50:02,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:50:02,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 08:50:02,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171307114] [2021-10-28 08:50:02,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:50:02,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:50:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:50:02,039 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) [2021-10-28 08:50:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:02,084 INFO L93 Difference]: Finished difference Result 297 states and 420 transitions. [2021-10-28 08:50:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:50:02,085 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 [2021-10-28 08:50:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:02,088 INFO L225 Difference]: With dead ends: 297 [2021-10-28 08:50:02,088 INFO L226 Difference]: Without dead ends: 297 [2021-10-28 08:50:02,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:50:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-10-28 08:50:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 281. [2021-10-28 08:50:02,103 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) [2021-10-28 08:50:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-10-28 08:50:02,106 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-10-28 08:50:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:02,106 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-10-28 08:50:02,107 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) [2021-10-28 08:50:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-10-28 08:50:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:50:02,108 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:02,108 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:02,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:02,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:02,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-10-28 08:50:02,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:02,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334264467] [2021-10-28 08:50:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:02,323 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:02,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 08:50:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:02,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:50:02,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:02,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:03,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:03,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334264467] [2021-10-28 08:50:03,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334264467] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:03,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:03,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 08:50:03,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541557289] [2021-10-28 08:50:03,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:50:03,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:50:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:50:03,255 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) [2021-10-28 08:50:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:04,159 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-10-28 08:50:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:50:04,161 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 [2021-10-28 08:50:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:04,167 INFO L225 Difference]: With dead ends: 690 [2021-10-28 08:50:04,168 INFO L226 Difference]: Without dead ends: 690 [2021-10-28 08:50:04,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:50:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-28 08:50:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-10-28 08:50:04,204 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) [2021-10-28 08:50:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-10-28 08:50:04,219 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-10-28 08:50:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:04,220 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-10-28 08:50:04,220 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) [2021-10-28 08:50:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-10-28 08:50:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:50:04,222 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:04,222 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:04,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:04,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:04,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-10-28 08:50:04,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:04,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312073345] [2021-10-28 08:50:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:04,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:04,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:04,444 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:04,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 08:50:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:50:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:05,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:05,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:05,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312073345] [2021-10-28 08:50:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312073345] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:05,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:05,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 08:50:05,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116614058] [2021-10-28 08:50:05,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:50:05,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:50:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:50:05,302 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) [2021-10-28 08:50:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:06,069 INFO L93 Difference]: Finished difference Result 945 states and 1354 transitions. [2021-10-28 08:50:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:50:06,070 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 [2021-10-28 08:50:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:06,078 INFO L225 Difference]: With dead ends: 945 [2021-10-28 08:50:06,078 INFO L226 Difference]: Without dead ends: 945 [2021-10-28 08:50:06,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:50:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-10-28 08:50:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 837. [2021-10-28 08:50:06,117 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) [2021-10-28 08:50:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1194 transitions. [2021-10-28 08:50:06,123 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1194 transitions. Word has length 20 [2021-10-28 08:50:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:06,124 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1194 transitions. [2021-10-28 08:50:06,124 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) [2021-10-28 08:50:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1194 transitions. [2021-10-28 08:50:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:50:06,126 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:06,126 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:06,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:06,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:06,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-10-28 08:50:06,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:06,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768245967] [2021-10-28 08:50:06,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:50:06,341 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:06,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:06,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-28 08:50:06,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:50:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:50:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:50:06,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:50:06,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:06,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768245967] [2021-10-28 08:50:06,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768245967] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:06,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:06,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-28 08:50:06,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615835790] [2021-10-28 08:50:06,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:50:06,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:50:06,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:50:06,962 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) [2021-10-28 08:50:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:07,233 INFO L93 Difference]: Finished difference Result 1191 states and 1639 transitions. [2021-10-28 08:50:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:50:07,235 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 [2021-10-28 08:50:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:07,243 INFO L225 Difference]: With dead ends: 1191 [2021-10-28 08:50:07,244 INFO L226 Difference]: Without dead ends: 1191 [2021-10-28 08:50:07,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:50:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-10-28 08:50:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1147. [2021-10-28 08:50:07,286 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) [2021-10-28 08:50:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1595 transitions. [2021-10-28 08:50:07,295 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1595 transitions. Word has length 27 [2021-10-28 08:50:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:07,295 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1595 transitions. [2021-10-28 08:50:07,296 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) [2021-10-28 08:50:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1595 transitions. [2021-10-28 08:50:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:50:07,298 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:07,298 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:07,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:07,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:07,512 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-10-28 08:50:07,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:07,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348206701] [2021-10-28 08:50:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:07,513 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:07,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:07,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:07,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-28 08:50:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:50:08,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:08,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:09,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:09,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348206701] [2021-10-28 08:50:09,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348206701] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:09,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:09,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-28 08:50:09,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820138791] [2021-10-28 08:50:09,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:50:09,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:50:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:50:09,084 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) [2021-10-28 08:50:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:10,117 INFO L93 Difference]: Finished difference Result 1680 states and 2292 transitions. [2021-10-28 08:50:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:50:10,118 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 [2021-10-28 08:50:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:10,129 INFO L225 Difference]: With dead ends: 1680 [2021-10-28 08:50:10,129 INFO L226 Difference]: Without dead ends: 1680 [2021-10-28 08:50:10,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:50:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-10-28 08:50:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-10-28 08:50:10,180 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) [2021-10-28 08:50:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2013 transitions. [2021-10-28 08:50:10,189 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2013 transitions. Word has length 29 [2021-10-28 08:50:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:10,190 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2013 transitions. [2021-10-28 08:50:10,190 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) [2021-10-28 08:50:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2013 transitions. [2021-10-28 08:50:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:50:10,191 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:10,192 INFO L513 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] [2021-10-28 08:50:10,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:10,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:10,408 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-10-28 08:50:10,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:10,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953451127] [2021-10-28 08:50:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:10,409 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:10,411 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:10,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-28 08:50:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:50:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:50:10,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:11,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:11,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953451127] [2021-10-28 08:50:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953451127] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:11,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:11,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-10-28 08:50:11,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089906743] [2021-10-28 08:50:11,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:50:11,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:50:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:50:11,238 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) [2021-10-28 08:50:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:12,529 INFO L93 Difference]: Finished difference Result 1681 states and 2147 transitions. [2021-10-28 08:50:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:50:12,530 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 [2021-10-28 08:50:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:12,540 INFO L225 Difference]: With dead ends: 1681 [2021-10-28 08:50:12,541 INFO L226 Difference]: Without dead ends: 1497 [2021-10-28 08:50:12,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:50:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-10-28 08:50:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-10-28 08:50:12,602 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) [2021-10-28 08:50:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1827 transitions. [2021-10-28 08:50:12,610 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1827 transitions. Word has length 30 [2021-10-28 08:50:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:12,610 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1827 transitions. [2021-10-28 08:50:12,611 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) [2021-10-28 08:50:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1827 transitions. [2021-10-28 08:50:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:50:12,613 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:12,613 INFO L513 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] [2021-10-28 08:50:12,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:12,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:12,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-10-28 08:50:12,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:12,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613512268] [2021-10-28 08:50:12,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:50:12,829 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:12,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:12,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:12,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-28 08:50:13,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:50:13,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:50:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:50:13,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:50:13,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:13,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613512268] [2021-10-28 08:50:13,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613512268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:13,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:13,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-10-28 08:50:13,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042177729] [2021-10-28 08:50:13,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:50:13,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:50:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:50:13,833 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) [2021-10-28 08:50:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:15,387 INFO L93 Difference]: Finished difference Result 2266 states and 3058 transitions. [2021-10-28 08:50:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:50:15,388 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 [2021-10-28 08:50:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:15,402 INFO L225 Difference]: With dead ends: 2266 [2021-10-28 08:50:15,403 INFO L226 Difference]: Without dead ends: 2170 [2021-10-28 08:50:15,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:50:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-10-28 08:50:15,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-10-28 08:50:15,475 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) [2021-10-28 08:50:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2765 transitions. [2021-10-28 08:50:15,488 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2765 transitions. Word has length 39 [2021-10-28 08:50:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:15,488 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2765 transitions. [2021-10-28 08:50:15,489 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) [2021-10-28 08:50:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2765 transitions. [2021-10-28 08:50:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:50:15,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:15,491 INFO L513 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] [2021-10-28 08:50:15,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:15,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:15,709 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-10-28 08:50:15,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:15,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129648770] [2021-10-28 08:50:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:15,711 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:15,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:15,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-28 08:50:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:50:16,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:50:16,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:16,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:16,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129648770] [2021-10-28 08:50:16,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129648770] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:16,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:16,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-28 08:50:16,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599398501] [2021-10-28 08:50:16,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:50:16,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:16,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:50:16,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:50:16,934 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) [2021-10-28 08:50:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:18,653 INFO L93 Difference]: Finished difference Result 2261 states and 2971 transitions. [2021-10-28 08:50:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:50:18,654 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 [2021-10-28 08:50:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:18,669 INFO L225 Difference]: With dead ends: 2261 [2021-10-28 08:50:18,669 INFO L226 Difference]: Without dead ends: 2089 [2021-10-28 08:50:18,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:50:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-10-28 08:50:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-10-28 08:50:18,751 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) [2021-10-28 08:50:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2603 transitions. [2021-10-28 08:50:18,763 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2603 transitions. Word has length 39 [2021-10-28 08:50:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:18,764 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2603 transitions. [2021-10-28 08:50:18,764 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) [2021-10-28 08:50:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2603 transitions. [2021-10-28 08:50:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:50:18,766 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:18,766 INFO L513 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] [2021-10-28 08:50:18,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:18,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:18,981 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-10-28 08:50:18,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:18,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799456449] [2021-10-28 08:50:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:18,983 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:18,984 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:19,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-28 08:50:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:19,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 08:50:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 08:50:20,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:22,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:22,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799456449] [2021-10-28 08:50:22,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799456449] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:22,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:22,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-10-28 08:50:22,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163343776] [2021-10-28 08:50:22,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 08:50:22,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 08:50:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-10-28 08:50:22,006 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) [2021-10-28 08:50:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:27,306 INFO L93 Difference]: Finished difference Result 3752 states and 4910 transitions. [2021-10-28 08:50:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 08:50:27,317 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 [2021-10-28 08:50:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:27,340 INFO L225 Difference]: With dead ends: 3752 [2021-10-28 08:50:27,340 INFO L226 Difference]: Without dead ends: 3716 [2021-10-28 08:50:27,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-10-28 08:50:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-10-28 08:50:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-10-28 08:50:27,479 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) [2021-10-28 08:50:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4031 transitions. [2021-10-28 08:50:27,496 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4031 transitions. Word has length 45 [2021-10-28 08:50:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:27,497 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4031 transitions. [2021-10-28 08:50:27,498 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) [2021-10-28 08:50:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4031 transitions. [2021-10-28 08:50:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 08:50:27,499 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:27,500 INFO L513 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] [2021-10-28 08:50:27,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:27,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:27,714 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-10-28 08:50:27,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:27,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381765555] [2021-10-28 08:50:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:27,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:27,717 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:27,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-28 08:50:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 08:50:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 08:50:28,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:29,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381765555] [2021-10-28 08:50:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381765555] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:29,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:29,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-10-28 08:50:29,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605824889] [2021-10-28 08:50:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:50:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:50:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:50:29,593 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) [2021-10-28 08:50:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:31,377 INFO L93 Difference]: Finished difference Result 4090 states and 5262 transitions. [2021-10-28 08:50:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:50:31,378 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 [2021-10-28 08:50:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:31,403 INFO L225 Difference]: With dead ends: 4090 [2021-10-28 08:50:31,403 INFO L226 Difference]: Without dead ends: 3950 [2021-10-28 08:50:31,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 08:50:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-10-28 08:50:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-10-28 08:50:31,538 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) [2021-10-28 08:50:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4862 transitions. [2021-10-28 08:50:31,549 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4862 transitions. Word has length 48 [2021-10-28 08:50:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:31,550 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4862 transitions. [2021-10-28 08:50:31,550 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) [2021-10-28 08:50:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4862 transitions. [2021-10-28 08:50:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 08:50:31,551 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:31,552 INFO L513 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] [2021-10-28 08:50:31,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:31,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:31,768 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-10-28 08:50:31,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:31,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107028774] [2021-10-28 08:50:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:31,769 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:31,770 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:31,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-28 08:50:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:32,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:50:32,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-28 08:50:33,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:34,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:34,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107028774] [2021-10-28 08:50:34,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107028774] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:34,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:34,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-10-28 08:50:34,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74258381] [2021-10-28 08:50:34,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 08:50:34,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 08:50:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:50:34,216 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) [2021-10-28 08:50:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:36,959 INFO L93 Difference]: Finished difference Result 4249 states and 5467 transitions. [2021-10-28 08:50:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 08:50:36,973 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 [2021-10-28 08:50:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:36,996 INFO L225 Difference]: With dead ends: 4249 [2021-10-28 08:50:36,996 INFO L226 Difference]: Without dead ends: 4177 [2021-10-28 08:50:36,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 08:50:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-10-28 08:50:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-10-28 08:50:37,112 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) [2021-10-28 08:50:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5233 transitions. [2021-10-28 08:50:37,123 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5233 transitions. Word has length 59 [2021-10-28 08:50:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:37,124 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5233 transitions. [2021-10-28 08:50:37,124 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) [2021-10-28 08:50:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5233 transitions. [2021-10-28 08:50:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 08:50:37,126 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:37,126 INFO L513 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] [2021-10-28 08:50:37,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:37,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:37,341 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-10-28 08:50:37,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:37,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571312429] [2021-10-28 08:50:37,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:50:37,343 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:37,344 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:37,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-28 08:50:37,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:50:37,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 08:50:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-28 08:50:38,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:50:41,289 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:41,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571312429] [2021-10-28 08:50:41,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571312429] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:41,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:41,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-10-28 08:50:41,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381582421] [2021-10-28 08:50:41,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 08:50:41,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:41,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 08:50:41,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:50:41,292 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) [2021-10-28 08:50:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:48,814 INFO L93 Difference]: Finished difference Result 7214 states and 9448 transitions. [2021-10-28 08:50:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 08:50:48,815 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 [2021-10-28 08:50:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:48,851 INFO L225 Difference]: With dead ends: 7214 [2021-10-28 08:50:48,851 INFO L226 Difference]: Without dead ends: 7154 [2021-10-28 08:50:48,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 08:50:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-10-28 08:50:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-10-28 08:50:49,052 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) [2021-10-28 08:50:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6611 transitions. [2021-10-28 08:50:49,073 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6611 transitions. Word has length 70 [2021-10-28 08:50:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:49,075 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6611 transitions. [2021-10-28 08:50:49,076 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) [2021-10-28 08:50:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6611 transitions. [2021-10-28 08:50:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 08:50:49,077 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:49,077 INFO L513 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] [2021-10-28 08:50:49,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-28 08:50:49,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:49,292 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-10-28 08:50:49,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:49,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980567455] [2021-10-28 08:50:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:49,293 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:49,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:49,294 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:49,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-28 08:50:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:49,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:50:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 08:50:50,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 08:50:50,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:50,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980567455] [2021-10-28 08:50:50,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980567455] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:50,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:50,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-28 08:50:50,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730700974] [2021-10-28 08:50:50,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:50:50,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:50,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:50:50,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:50:50,568 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) [2021-10-28 08:50:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:51,203 INFO L93 Difference]: Finished difference Result 9835 states and 12944 transitions. [2021-10-28 08:50:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:50:51,204 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 [2021-10-28 08:50:51,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:51,246 INFO L225 Difference]: With dead ends: 9835 [2021-10-28 08:50:51,246 INFO L226 Difference]: Without dead ends: 9835 [2021-10-28 08:50:51,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:50:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-10-28 08:50:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 9811. [2021-10-28 08:50:51,520 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) [2021-10-28 08:50:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 12924 transitions. [2021-10-28 08:50:51,546 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 12924 transitions. Word has length 71 [2021-10-28 08:50:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:51,547 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 12924 transitions. [2021-10-28 08:50:51,547 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) [2021-10-28 08:50:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 12924 transitions. [2021-10-28 08:50:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 08:50:51,549 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:51,549 INFO L513 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] [2021-10-28 08:50:51,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:51,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:51,766 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:51,767 INFO L85 PathProgramCache]: Analyzing trace with hash -511357765, now seen corresponding path program 1 times [2021-10-28 08:50:51,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:51,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428707820] [2021-10-28 08:50:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:51,768 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:51,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:51,772 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:51,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-28 08:50:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 08:50:52,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:52,587 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 [2021-10-28 08:50:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 08:50:53,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 08:50:54,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:54,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428707820] [2021-10-28 08:50:54,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428707820] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:54,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:54,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-28 08:50:54,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902116559] [2021-10-28 08:50:54,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:50:54,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:50:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:50:54,055 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) [2021-10-28 08:50:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:56,766 INFO L93 Difference]: Finished difference Result 16626 states and 22220 transitions. [2021-10-28 08:50:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:50:56,767 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 [2021-10-28 08:50:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:56,837 INFO L225 Difference]: With dead ends: 16626 [2021-10-28 08:50:56,837 INFO L226 Difference]: Without dead ends: 16626 [2021-10-28 08:50:56,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:50:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16626 states. [2021-10-28 08:50:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16626 to 14338. [2021-10-28 08:50:57,257 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) [2021-10-28 08:50:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14338 states to 14338 states and 19290 transitions. [2021-10-28 08:50:57,298 INFO L78 Accepts]: Start accepts. Automaton has 14338 states and 19290 transitions. Word has length 79 [2021-10-28 08:50:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:57,299 INFO L470 AbstractCegarLoop]: Abstraction has 14338 states and 19290 transitions. [2021-10-28 08:50:57,299 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) [2021-10-28 08:50:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 14338 states and 19290 transitions. [2021-10-28 08:50:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 08:50:57,369 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:57,369 INFO L513 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] [2021-10-28 08:50:57,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-28 08:50:57,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:57,570 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:50:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash -511357764, now seen corresponding path program 1 times [2021-10-28 08:50:57,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:57,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100269868] [2021-10-28 08:50:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:57,571 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:57,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:57,573 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:57,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-28 08:50:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 08:50:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:59,014 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 [2021-10-28 08:50:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 08:50:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:51:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 08:51:03,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:51:03,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100269868] [2021-10-28 08:51:03,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100269868] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:51:03,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:03,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-28 08:51:03,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138831641] [2021-10-28 08:51:03,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:51:03,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:51:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:51:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:51:03,439 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) [2021-10-28 08:51:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:10,198 INFO L93 Difference]: Finished difference Result 22975 states and 31271 transitions. [2021-10-28 08:51:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:51:10,200 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 [2021-10-28 08:51:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:10,282 INFO L225 Difference]: With dead ends: 22975 [2021-10-28 08:51:10,282 INFO L226 Difference]: Without dead ends: 22975 [2021-10-28 08:51:10,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 08:51:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22975 states. [2021-10-28 08:51:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22975 to 19568. [2021-10-28 08:51:10,766 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) [2021-10-28 08:51:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19568 states to 19568 states and 26940 transitions. [2021-10-28 08:51:10,819 INFO L78 Accepts]: Start accepts. Automaton has 19568 states and 26940 transitions. Word has length 79 [2021-10-28 08:51:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:10,820 INFO L470 AbstractCegarLoop]: Abstraction has 19568 states and 26940 transitions. [2021-10-28 08:51:10,820 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) [2021-10-28 08:51:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 19568 states and 26940 transitions. [2021-10-28 08:51:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 08:51:10,824 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:10,825 INFO L513 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] [2021-10-28 08:51:10,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-10-28 08:51:11,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:51:11,041 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:51:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash 175036294, now seen corresponding path program 1 times [2021-10-28 08:51:11,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:51:11,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669384011] [2021-10-28 08:51:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:11,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:51:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:51:11,044 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:51:11,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-28 08:51:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:51:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-10-28 08:51:12,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:51:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 29 proven. 42 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 08:51:13,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:51:13,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669384011] [2021-10-28 08:51:13,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669384011] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:51:13,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:13,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-28 08:51:13,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836524697] [2021-10-28 08:51:13,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:51:13,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:51:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:51:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:51:13,355 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) [2021-10-28 08:51:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:15,089 INFO L93 Difference]: Finished difference Result 26145 states and 35199 transitions. [2021-10-28 08:51:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 08:51:15,093 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 [2021-10-28 08:51:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:15,312 INFO L225 Difference]: With dead ends: 26145 [2021-10-28 08:51:15,312 INFO L226 Difference]: Without dead ends: 24927 [2021-10-28 08:51:15,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 08:51:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24927 states. [2021-10-28 08:51:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24927 to 23061. [2021-10-28 08:51:15,951 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) [2021-10-28 08:51:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23061 states to 23061 states and 31643 transitions. [2021-10-28 08:51:16,026 INFO L78 Accepts]: Start accepts. Automaton has 23061 states and 31643 transitions. Word has length 98 [2021-10-28 08:51:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:16,026 INFO L470 AbstractCegarLoop]: Abstraction has 23061 states and 31643 transitions. [2021-10-28 08:51:16,027 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) [2021-10-28 08:51:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 23061 states and 31643 transitions. [2021-10-28 08:51:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-28 08:51:16,034 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:16,035 INFO L513 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] [2021-10-28 08:51:16,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:51:16,256 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:51:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash -159277390, now seen corresponding path program 2 times [2021-10-28 08:51:16,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:51:16,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639051796] [2021-10-28 08:51:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:51:16,257 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:51:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:51:16,258 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:51:16,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-28 08:51:17,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:51:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:17,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:51:17,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 92 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 08:51:17,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:51:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 48 proven. 57 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-28 08:51:19,022 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:51:19,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639051796] [2021-10-28 08:51:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639051796] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:51:19,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:19,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-10-28 08:51:19,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553497754] [2021-10-28 08:51:19,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:51:19,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:51:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:51:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:51:19,025 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) [2021-10-28 08:51:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:22,141 INFO L93 Difference]: Finished difference Result 65936 states and 93992 transitions. [2021-10-28 08:51:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 08:51:22,142 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 [2021-10-28 08:51:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:22,622 INFO L225 Difference]: With dead ends: 65936 [2021-10-28 08:51:22,623 INFO L226 Difference]: Without dead ends: 64256 [2021-10-28 08:51:22,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 08:51:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64256 states. [2021-10-28 08:51:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64256 to 61721. [2021-10-28 08:51:24,926 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) [2021-10-28 08:51:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61721 states to 61721 states and 88687 transitions. [2021-10-28 08:51:25,383 INFO L78 Accepts]: Start accepts. Automaton has 61721 states and 88687 transitions. Word has length 107 [2021-10-28 08:51:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:25,383 INFO L470 AbstractCegarLoop]: Abstraction has 61721 states and 88687 transitions. [2021-10-28 08:51:25,384 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) [2021-10-28 08:51:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 61721 states and 88687 transitions. [2021-10-28 08:51:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-28 08:51:25,392 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:25,392 INFO L513 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] [2021-10-28 08:51:25,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:25,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:51:25,610 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:51:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1851960145, now seen corresponding path program 1 times [2021-10-28 08:51:25,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:51:25,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997565652] [2021-10-28 08:51:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:25,612 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:51:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:51:25,613 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:51:25,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-28 08:51:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:51:27,054 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:51:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:51:27,624 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 08:51:27,625 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:51:27,626 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:51:27,762 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-28 08:51:27,763 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-28 08:51:27,763 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-28 08:51:27,763 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-28 08:51:27,763 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-28 08:51:27,763 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-28 08:51:27,763 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-28 08:51:27,763 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:51:27,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:51:27,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:51:27,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:51:27,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:27,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:51:27,969 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:27,982 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:51:28,112 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:51:28,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:51:28 BoogieIcfgContainer [2021-10-28 08:51:28,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:51:28,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:51:28,302 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:51:28,302 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:51:28,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:55" (3/4) ... [2021-10-28 08:51:28,307 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:51:28,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:51:28,309 INFO L168 Benchmark]: Toolchain (without parser) took 94676.91 ms. Allocated memory was 58.7 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 34.8 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 401.0 MB. Max. memory is 16.1 GB. [2021-10-28 08:51:28,311 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 58.7 MB. Free memory was 39.7 MB in the beginning and 39.6 MB in the end (delta: 42.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:51:28,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 558.86 ms. Allocated memory is still 58.7 MB. Free memory was 34.5 MB in the beginning and 32.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:51:28,313 INFO L168 Benchmark]: Boogie Preprocessor took 126.49 ms. Allocated memory is still 58.7 MB. Free memory was 32.1 MB in the beginning and 29.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:51:28,313 INFO L168 Benchmark]: RCFGBuilder took 1049.70 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 29.0 MB in the beginning and 43.4 MB in the end (delta: -14.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:51:28,314 INFO L168 Benchmark]: TraceAbstraction took 92928.20 ms. Allocated memory was 71.3 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 43.1 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 490.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:51:28,314 INFO L168 Benchmark]: Witness Printer took 5.76 ms. Allocated memory is still 2.3 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:51:28,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 58.7 MB. Free memory was 39.7 MB in the beginning and 39.6 MB in the end (delta: 42.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 558.86 ms. Allocated memory is still 58.7 MB. Free memory was 34.5 MB in the beginning and 32.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 126.49 ms. Allocated memory is still 58.7 MB. Free memory was 32.1 MB in the beginning and 29.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1049.70 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 29.0 MB in the beginning and 43.4 MB in the end (delta: -14.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 92928.20 ms. Allocated memory was 71.3 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 43.1 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 490.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.76 ms. Allocated memory is still 2.3 GB. Free memory is still 1.8 GB. 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\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: 92.5s, OverallIterations: 24, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 42.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3107 SDtfs, 16252 SDslu, 5564 SDs, 0 SdLazy, 14139 SolverSat, 3928 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2263 GetRequests, 1651 SyntacticMatches, 10 SemanticMatches, 602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 20.9s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 14350 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 23.8s 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 [2021-10-28 08:51:28,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7345de48-0625-4e4b-86c1-4a08ee89156e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...