./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.1.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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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 f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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 f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 08:47:11,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:47:11,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:47:11,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:47:11,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:47:11,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:47:11,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:47:11,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:47:11,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:47:11,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:47:11,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:47:11,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:47:11,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:47:11,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:47:11,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:47:11,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:47:11,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:47:11,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:47:11,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:47:11,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:47:11,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:47:11,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:47:11,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:47:11,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:47:11,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:47:11,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:47:11,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:47:11,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:47:11,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:47:11,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:47:11,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:47:11,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:47:11,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:47:11,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:47:11,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:47:11,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:47:11,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:47:11,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:47:11,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:47:11,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:47:11,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:47:11,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:47:11,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:47:11,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:47:11,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:47:11,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:47:11,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:47:11,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:47:11,537 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:47:11,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:47:11,538 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:47:11,538 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:47:11,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:47:11,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:47:11,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:47:11,539 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:47:11,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:47:11,539 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:47:11,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:47:11,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:47:11,540 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:47:11,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:47:11,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:47:11,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:47:11,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:47:11,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:47:11,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:47:11,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:47:11,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:47:11,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:47:11,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:47:11,545 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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f [2021-10-28 08:47:11,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:47:11,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:47:11,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:47:11,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:47:11,872 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:47:11,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-28 08:47:11,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/33ce60841/b0ff14fc795a4c27a05b77bf145864a8/FLAGe0eeaeeae [2021-10-28 08:47:12,543 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:47:12,544 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-28 08:47:12,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/33ce60841/b0ff14fc795a4c27a05b77bf145864a8/FLAGe0eeaeeae [2021-10-28 08:47:12,804 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/33ce60841/b0ff14fc795a4c27a05b77bf145864a8 [2021-10-28 08:47:12,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:47:12,814 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:47:12,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:47:12,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:47:12,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:47:12,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:12" (1/1) ... [2021-10-28 08:47:12,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57629039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:12, skipping insertion in model container [2021-10-28 08:47:12,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:12" (1/1) ... [2021-10-28 08:47:12,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:47:12,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:47:13,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:47:13,239 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:47:13,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:47:13,335 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:47:13,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13 WrapperNode [2021-10-28 08:47:13,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:47:13,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:47:13,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:47:13,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:47:13,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:47:13,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:47:13,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:47:13,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:47:13,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (1/1) ... [2021-10-28 08:47:13,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:47:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:13,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:47:13,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:47:13,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:47:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:47:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:47:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:47:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:47:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:47:13,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:47:13,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:47:13,504 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-28 08:47:13,504 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-28 08:47:13,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:47:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:47:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:47:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:47:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:47:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:47:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:47:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:47:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:47:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:47:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:47:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:47:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:47:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:47:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:47:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:47:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:47:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:47:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:47:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:47:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:47:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:47:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:47:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:47:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:47:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:47:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:47:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:47:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:47:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:47:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:47:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:47:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:47:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:47:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:47:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:47:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:47:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:47:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:47:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:47:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:47:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:47:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:47:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:47:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:47:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:47:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:47:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:47:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:47:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:47:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:47:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:47:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:47:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:47:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:47:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:47:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:47:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:47:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:47:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:47:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:47:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:47:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:47:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:47:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:47:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:47:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:47:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:47:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:47:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:47:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:47:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:47:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:47:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:47:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:47:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:47:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:47:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:47:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:47:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:47:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:47:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:47:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:47:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:47:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:47:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:47:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:47:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:47:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:47:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:47:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:47:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-28 08:47:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:47:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:47:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:47:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-28 08:47:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:47:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:47:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:47:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:47:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:47:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:47:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:47:14,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:47:14,122 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:47:14,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:14 BoogieIcfgContainer [2021-10-28 08:47:14,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:47:14,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:47:14,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:47:14,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:47:14,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:47:12" (1/3) ... [2021-10-28 08:47:14,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b24e9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:14, skipping insertion in model container [2021-10-28 08:47:14,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:13" (2/3) ... [2021-10-28 08:47:14,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b24e9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:14, skipping insertion in model container [2021-10-28 08:47:14,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:14" (3/3) ... [2021-10-28 08:47:14,134 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2021-10-28 08:47:14,139 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:47:14,139 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 08:47:14,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:47:14,206 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 08:47:14,207 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 08:47:14,223 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 08:47:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:47:14,231 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:14,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:14,232 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-10-28 08:47:14,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:14,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973230444] [2021-10-28 08:47:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:14,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:14,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:14,637 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 08:47:14,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:14,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973230444] [2021-10-28 08:47:14,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973230444] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:14,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:14,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:47:14,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259305983] [2021-10-28 08:47:14,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:47:14,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:47:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:47:14,684 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 08:47:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:14,998 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-10-28 08:47:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:47:15,000 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 08:47:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:15,014 INFO L225 Difference]: With dead ends: 92 [2021-10-28 08:47:15,014 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 08:47:15,017 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 08:47:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 08:47:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-28 08:47:15,068 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 08:47:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-10-28 08:47:15,074 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-10-28 08:47:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:15,074 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-10-28 08:47:15,074 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 08:47:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-10-28 08:47:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:47:15,076 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:15,076 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:47:15,077 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-10-28 08:47:15,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:15,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108008492] [2021-10-28 08:47:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:15,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:15,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:15,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:15,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108008492] [2021-10-28 08:47:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108008492] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:15,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:15,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:47:15,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755645128] [2021-10-28 08:47:15,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:47:15,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:47:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:47:15,275 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 08:47:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:15,587 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-10-28 08:47:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:47:15,588 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 08:47:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:15,593 INFO L225 Difference]: With dead ends: 91 [2021-10-28 08:47:15,593 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 08:47:15,594 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 08:47:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 08:47:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-10-28 08:47:15,609 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 08:47:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-10-28 08:47:15,615 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-10-28 08:47:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:15,616 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-10-28 08:47:15,616 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 08:47:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-10-28 08:47:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:47:15,618 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:15,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:15,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:47:15,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-10-28 08:47:15,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:15,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162987616] [2021-10-28 08:47:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:15,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:15,797 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 08:47:15,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:15,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162987616] [2021-10-28 08:47:15,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162987616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:15,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:15,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:47:15,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192966199] [2021-10-28 08:47:15,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:47:15,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:47:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:47:15,800 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 08:47:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:16,129 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-10-28 08:47:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:47:16,130 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 08:47:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:16,135 INFO L225 Difference]: With dead ends: 135 [2021-10-28 08:47:16,135 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 08:47:16,136 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 08:47:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 08:47:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-10-28 08:47:16,155 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 08:47:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-10-28 08:47:16,157 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-10-28 08:47:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:16,157 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-10-28 08:47:16,158 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 08:47:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-10-28 08:47:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:47:16,159 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:16,159 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:16,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:47:16,159 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 08:47:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-10-28 08:47:16,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:16,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955901656] [2021-10-28 08:47:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:16,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:16,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:16,297 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 08:47:16,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:16,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955901656] [2021-10-28 08:47:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955901656] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:16,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:16,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:47:16,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908161270] [2021-10-28 08:47:16,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:47:16,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:47:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:47:16,306 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 08:47:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:16,511 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-10-28 08:47:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:47:16,513 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 08:47:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:16,515 INFO L225 Difference]: With dead ends: 149 [2021-10-28 08:47:16,515 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 08:47:16,516 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 08:47:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 08:47:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-10-28 08:47:16,526 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 08:47:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-10-28 08:47:16,528 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-10-28 08:47:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:16,529 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-10-28 08:47:16,529 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 08:47:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-10-28 08:47:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:47:16,530 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:16,530 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:16,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:47:16,530 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-10-28 08:47:16,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:16,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102660221] [2021-10-28 08:47:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:16,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:16,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:16,661 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 08:47:16,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:16,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102660221] [2021-10-28 08:47:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102660221] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:16,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:47:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131839395] [2021-10-28 08:47:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:47:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:47:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:47:16,664 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 08:47:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:16,948 INFO L93 Difference]: Finished difference Result 134 states and 196 transitions. [2021-10-28 08:47:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:47:16,950 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 08:47:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:16,952 INFO L225 Difference]: With dead ends: 134 [2021-10-28 08:47:16,952 INFO L226 Difference]: Without dead ends: 134 [2021-10-28 08:47:16,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:47:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-28 08:47:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-10-28 08:47:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.7582417582417582) internal successors, (160), 116 states have internal predecessors, (160), 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 08:47:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-10-28 08:47:16,963 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 13 [2021-10-28 08:47:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:16,963 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-10-28 08:47:16,963 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 08:47:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-10-28 08:47:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:47:16,964 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:16,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:16,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:47:16,965 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-10-28 08:47:16,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:16,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253011526] [2021-10-28 08:47:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:16,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:17,053 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 08:47:17,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:17,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253011526] [2021-10-28 08:47:17,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253011526] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:17,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:17,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:47:17,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079434457] [2021-10-28 08:47:17,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:47:17,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:47:17,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:47:17,057 INFO L87 Difference]: Start difference. First operand 128 states and 185 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 08:47:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:17,411 INFO L93 Difference]: Finished difference Result 220 states and 324 transitions. [2021-10-28 08:47:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:47:17,413 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 08:47:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:17,416 INFO L225 Difference]: With dead ends: 220 [2021-10-28 08:47:17,416 INFO L226 Difference]: Without dead ends: 220 [2021-10-28 08:47:17,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:47:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-28 08:47:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 195. [2021-10-28 08:47:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 152 states have (on average 1.7236842105263157) internal successors, (262), 177 states have internal predecessors, (262), 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 08:47:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 300 transitions. [2021-10-28 08:47:17,437 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 300 transitions. Word has length 13 [2021-10-28 08:47:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:17,438 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 300 transitions. [2021-10-28 08:47:17,438 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 08:47:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 300 transitions. [2021-10-28 08:47:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:47:17,439 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:17,445 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:17,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:47:17,446 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:17,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-10-28 08:47:17,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:17,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293834872] [2021-10-28 08:47:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:17,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:17,569 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 08:47:17,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:17,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293834872] [2021-10-28 08:47:17,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293834872] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:17,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:17,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:47:17,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827587423] [2021-10-28 08:47:17,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:47:17,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:47:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:47:17,573 INFO L87 Difference]: Start difference. First operand 195 states and 300 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 08:47:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:17,928 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2021-10-28 08:47:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:47:17,928 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 08:47:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:17,933 INFO L225 Difference]: With dead ends: 271 [2021-10-28 08:47:17,934 INFO L226 Difference]: Without dead ends: 271 [2021-10-28 08:47:17,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:47:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-28 08:47:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 249. [2021-10-28 08:47:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 204 states have (on average 1.696078431372549) internal successors, (346), 227 states have internal predecessors, (346), 14 states have call successors, (14), 14 states have call predecessors, (14), 15 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-28 08:47:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 384 transitions. [2021-10-28 08:47:17,954 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 384 transitions. Word has length 13 [2021-10-28 08:47:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:17,955 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 384 transitions. [2021-10-28 08:47:17,955 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 08:47:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 384 transitions. [2021-10-28 08:47:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:47:17,956 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:17,956 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:17,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:47:17,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-10-28 08:47:17,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:17,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835871958] [2021-10-28 08:47:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:17,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:18,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:18,069 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 08:47:18,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:18,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835871958] [2021-10-28 08:47:18,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835871958] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:18,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:18,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:47:18,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449353511] [2021-10-28 08:47:18,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:47:18,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:47:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:47:18,071 INFO L87 Difference]: Start difference. First operand 249 states and 384 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 08:47:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:18,324 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2021-10-28 08:47:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:47:18,325 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 08:47:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:18,327 INFO L225 Difference]: With dead ends: 235 [2021-10-28 08:47:18,327 INFO L226 Difference]: Without dead ends: 235 [2021-10-28 08:47:18,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:47:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-28 08:47:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 200. [2021-10-28 08:47:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 163 states have (on average 1.6319018404907975) internal successors, (266), 180 states have internal predecessors, (266), 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 08:47:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 296 transitions. [2021-10-28 08:47:18,350 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 296 transitions. Word has length 14 [2021-10-28 08:47:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:18,350 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 296 transitions. [2021-10-28 08:47:18,350 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 08:47:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 296 transitions. [2021-10-28 08:47:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:47:18,353 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:18,353 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:18,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:47:18,354 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-10-28 08:47:18,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:18,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339966919] [2021-10-28 08:47:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:18,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:18,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:18,470 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 08:47:18,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:18,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339966919] [2021-10-28 08:47:18,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339966919] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:18,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:18,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:47:18,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267766979] [2021-10-28 08:47:18,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:47:18,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:18,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:47:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:47:18,476 INFO L87 Difference]: Start difference. First operand 200 states and 296 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 08:47:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:18,726 INFO L93 Difference]: Finished difference Result 367 states and 512 transitions. [2021-10-28 08:47:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:47:18,726 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 08:47:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:18,729 INFO L225 Difference]: With dead ends: 367 [2021-10-28 08:47:18,729 INFO L226 Difference]: Without dead ends: 367 [2021-10-28 08:47:18,730 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 08:47:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-28 08:47:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 341. [2021-10-28 08:47:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 276 states have (on average 1.5072463768115942) internal successors, (416), 305 states have internal predecessors, (416), 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 08:47:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2021-10-28 08:47:18,752 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 15 [2021-10-28 08:47:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:18,753 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2021-10-28 08:47:18,753 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 08:47:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2021-10-28 08:47:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:47:18,759 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:18,759 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 08:47:18,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:47:18,759 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 08:47:18,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:18,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-10-28 08:47:18,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:18,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233145655] [2021-10-28 08:47:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:18,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:18,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:18,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:18,927 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 08:47:18,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:18,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233145655] [2021-10-28 08:47:18,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233145655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:18,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174776134] [2021-10-28 08:47:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:18,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:18,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:18,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:47:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:19,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:47:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:19,259 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 08:47:19,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174776134] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:19,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:19,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-28 08:47:19,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765626784] [2021-10-28 08:47:19,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:47:19,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:47:19,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:47:19,261 INFO L87 Difference]: Start difference. First operand 341 states and 482 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 08:47:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:20,235 INFO L93 Difference]: Finished difference Result 431 states and 610 transitions. [2021-10-28 08:47:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:47:20,236 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 08:47:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:20,242 INFO L225 Difference]: With dead ends: 431 [2021-10-28 08:47:20,243 INFO L226 Difference]: Without dead ends: 431 [2021-10-28 08:47:20,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:47:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-10-28 08:47:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 355. [2021-10-28 08:47:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 281 states have (on average 1.4697508896797153) internal successors, (413), 319 states have internal predecessors, (413), 22 states have call successors, (22), 22 states have call predecessors, (22), 40 states have return successors, (53), 13 states have call predecessors, (53), 21 states have call successors, (53) [2021-10-28 08:47:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 488 transitions. [2021-10-28 08:47:20,273 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 488 transitions. Word has length 22 [2021-10-28 08:47:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:20,273 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 488 transitions. [2021-10-28 08:47:20,273 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 08:47:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 488 transitions. [2021-10-28 08:47:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:47:20,276 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:20,276 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:20,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:20,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:47:20,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1528489980, now seen corresponding path program 1 times [2021-10-28 08:47:20,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:20,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062517324] [2021-10-28 08:47:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:20,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:20,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:20,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:20,678 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 08:47:20,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:20,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062517324] [2021-10-28 08:47:20,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062517324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:20,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968384595] [2021-10-28 08:47:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:20,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:20,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:20,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:47:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:20,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:47:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:21,032 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 08:47:21,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968384595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:21,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:21,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-28 08:47:21,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317845982] [2021-10-28 08:47:21,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:47:21,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:47:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:47:21,035 INFO L87 Difference]: Start difference. First operand 355 states and 488 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 08:47:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:21,871 INFO L93 Difference]: Finished difference Result 623 states and 847 transitions. [2021-10-28 08:47:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:47:21,872 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 08:47:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:21,876 INFO L225 Difference]: With dead ends: 623 [2021-10-28 08:47:21,876 INFO L226 Difference]: Without dead ends: 623 [2021-10-28 08:47:21,877 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 08:47:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-10-28 08:47:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 530. [2021-10-28 08:47:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 416 states have (on average 1.4254807692307692) internal successors, (593), 478 states have internal predecessors, (593), 32 states have call successors, (32), 32 states have call predecessors, (32), 70 states have return successors, (91), 19 states have call predecessors, (91), 31 states have call successors, (91) [2021-10-28 08:47:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 716 transitions. [2021-10-28 08:47:21,902 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 716 transitions. Word has length 24 [2021-10-28 08:47:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:21,902 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 716 transitions. [2021-10-28 08:47:21,903 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 08:47:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 716 transitions. [2021-10-28 08:47:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:47:21,904 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:21,904 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:21,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:22,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:22,127 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash -358281637, now seen corresponding path program 1 times [2021-10-28 08:47:22,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:22,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669370367] [2021-10-28 08:47:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:22,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:22,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:22,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:47:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:22,346 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 08:47:22,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:22,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669370367] [2021-10-28 08:47:22,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669370367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:22,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208709281] [2021-10-28 08:47:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:22,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:22,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:22,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:47:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 08:47:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:22,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208709281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:22,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:22,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-10-28 08:47:22,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057168217] [2021-10-28 08:47:22,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:47:22,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:47:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:47:22,804 INFO L87 Difference]: Start difference. First operand 530 states and 716 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:47:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:23,903 INFO L93 Difference]: Finished difference Result 1727 states and 2420 transitions. [2021-10-28 08:47:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:47:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-10-28 08:47:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:23,915 INFO L225 Difference]: With dead ends: 1727 [2021-10-28 08:47:23,915 INFO L226 Difference]: Without dead ends: 1727 [2021-10-28 08:47:23,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:47:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-10-28 08:47:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1484. [2021-10-28 08:47:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1196 states have (on average 1.4088628762541806) internal successors, (1685), 1336 states have internal predecessors, (1685), 92 states have call successors, (92), 92 states have call predecessors, (92), 184 states have return successors, (271), 55 states have call predecessors, (271), 91 states have call successors, (271) [2021-10-28 08:47:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2048 transitions. [2021-10-28 08:47:23,981 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2048 transitions. Word has length 35 [2021-10-28 08:47:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:23,982 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2048 transitions. [2021-10-28 08:47:23,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:47:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2048 transitions. [2021-10-28 08:47:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:47:23,984 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:23,984 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 08:47:24,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:24,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 08:47:24,212 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 08:47:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-10-28 08:47:24,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:24,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171432261] [2021-10-28 08:47:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:24,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:24,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:24,473 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 08:47:24,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:24,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171432261] [2021-10-28 08:47:24,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171432261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:24,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844624553] [2021-10-28 08:47:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:24,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:24,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:24,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:47:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:47:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:24,884 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 08:47:24,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844624553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:24,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:24,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-28 08:47:24,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466290548] [2021-10-28 08:47:24,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:47:24,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:47:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:47:24,887 INFO L87 Difference]: Start difference. First operand 1484 states and 2048 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 08:47:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:25,831 INFO L93 Difference]: Finished difference Result 2098 states and 3033 transitions. [2021-10-28 08:47:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 08:47:25,832 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 08:47:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:25,847 INFO L225 Difference]: With dead ends: 2098 [2021-10-28 08:47:25,847 INFO L226 Difference]: Without dead ends: 2098 [2021-10-28 08:47:25,848 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 08:47:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-10-28 08:47:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1836. [2021-10-28 08:47:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1471 states have (on average 1.399048266485384) internal successors, (2058), 1652 states have internal predecessors, (2058), 128 states have call successors, (128), 110 states have call predecessors, (128), 225 states have return successors, (377), 73 states have call predecessors, (377), 127 states have call successors, (377) [2021-10-28 08:47:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2563 transitions. [2021-10-28 08:47:25,935 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2563 transitions. Word has length 36 [2021-10-28 08:47:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:25,935 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 2563 transitions. [2021-10-28 08:47:25,935 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 08:47:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2563 transitions. [2021-10-28 08:47:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 08:47:25,937 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:25,937 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:25,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:26,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 08:47:26,151 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1424599507, now seen corresponding path program 1 times [2021-10-28 08:47:26,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:26,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660312040] [2021-10-28 08:47:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:26,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:47:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,386 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 08:47:26,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:26,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660312040] [2021-10-28 08:47:26,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660312040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:26,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289395635] [2021-10-28 08:47:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:26,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:26,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:26,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:47:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 08:47:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:26,833 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 08:47:26,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289395635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:26,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:26,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-10-28 08:47:26,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533408451] [2021-10-28 08:47:26,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:47:26,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:47:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:47:26,837 INFO L87 Difference]: Start difference. First operand 1836 states and 2563 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 08:47:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:27,925 INFO L93 Difference]: Finished difference Result 1171 states and 1534 transitions. [2021-10-28 08:47:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 08:47:27,926 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 08:47:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:27,933 INFO L225 Difference]: With dead ends: 1171 [2021-10-28 08:47:27,933 INFO L226 Difference]: Without dead ends: 1073 [2021-10-28 08:47:27,934 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 08:47:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-10-28 08:47:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 906. [2021-10-28 08:47:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 714 states have (on average 1.3389355742296918) internal successors, (956), 802 states have internal predecessors, (956), 76 states have call successors, (76), 64 states have call predecessors, (76), 104 states have return successors, (157), 39 states have call predecessors, (157), 75 states have call successors, (157) [2021-10-28 08:47:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1189 transitions. [2021-10-28 08:47:27,979 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1189 transitions. Word has length 38 [2021-10-28 08:47:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:27,981 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1189 transitions. [2021-10-28 08:47:27,982 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 08:47:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1189 transitions. [2021-10-28 08:47:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:47:27,984 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:27,985 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 08:47:28,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:28,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:28,211 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 08:47:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-10-28 08:47:28,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:28,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413208945] [2021-10-28 08:47:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:28,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:28,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:28,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:28,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:28,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:47:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:28,442 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 08:47:28,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:28,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413208945] [2021-10-28 08:47:28,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413208945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:28,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996547426] [2021-10-28 08:47:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:28,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:28,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:28,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:28,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:47:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:47:28,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:28,977 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 08:47:28,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996547426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:28,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:28,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-28 08:47:28,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518085218] [2021-10-28 08:47:28,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:47:28,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:47:28,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:47:28,980 INFO L87 Difference]: Start difference. First operand 906 states and 1189 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 08:47:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:30,261 INFO L93 Difference]: Finished difference Result 1632 states and 2214 transitions. [2021-10-28 08:47:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:47:30,262 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 08:47:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:30,272 INFO L225 Difference]: With dead ends: 1632 [2021-10-28 08:47:30,272 INFO L226 Difference]: Without dead ends: 1632 [2021-10-28 08:47:30,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:47:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-10-28 08:47:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1297. [2021-10-28 08:47:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1034 states have (on average 1.3549323017408124) internal successors, (1401), 1157 states have internal predecessors, (1401), 100 states have call successors, (100), 88 states have call predecessors, (100), 151 states have return successors, (209), 51 states have call predecessors, (209), 99 states have call successors, (209) [2021-10-28 08:47:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1710 transitions. [2021-10-28 08:47:30,325 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1710 transitions. Word has length 47 [2021-10-28 08:47:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:30,326 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1710 transitions. [2021-10-28 08:47:30,326 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 08:47:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1710 transitions. [2021-10-28 08:47:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 08:47:30,328 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:30,328 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 08:47:30,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:30,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:30,543 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 08:47:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-10-28 08:47:30,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:30,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747414399] [2021-10-28 08:47:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:30,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:47:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:47:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,744 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 08:47:30,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:30,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747414399] [2021-10-28 08:47:30,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747414399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:30,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853185019] [2021-10-28 08:47:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:30,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:30,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:30,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:30,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:47:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:47:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:31,226 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 08:47:31,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853185019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:31,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:31,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-10-28 08:47:31,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658529599] [2021-10-28 08:47:31,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:47:31,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:47:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:47:31,230 INFO L87 Difference]: Start difference. First operand 1297 states and 1710 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 08:47:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:31,863 INFO L93 Difference]: Finished difference Result 1831 states and 2507 transitions. [2021-10-28 08:47:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:47:31,864 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 08:47:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:31,877 INFO L225 Difference]: With dead ends: 1831 [2021-10-28 08:47:31,878 INFO L226 Difference]: Without dead ends: 1831 [2021-10-28 08:47:31,878 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 08:47:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-10-28 08:47:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1321. [2021-10-28 08:47:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1046 states have (on average 1.3508604206500956) internal successors, (1413), 1181 states have internal predecessors, (1413), 100 states have call successors, (100), 88 states have call predecessors, (100), 163 states have return successors, (233), 51 states have call predecessors, (233), 99 states have call successors, (233) [2021-10-28 08:47:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1746 transitions. [2021-10-28 08:47:31,940 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1746 transitions. Word has length 58 [2021-10-28 08:47:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:31,941 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1746 transitions. [2021-10-28 08:47:31,941 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 08:47:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1746 transitions. [2021-10-28 08:47:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:47:31,943 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:31,943 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 08:47:31,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:32,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:47:32,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:32,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-10-28 08:47:32,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:32,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921993980] [2021-10-28 08:47:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:32,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-28 08:47:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-28 08:47:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,426 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 08:47:32,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:32,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921993980] [2021-10-28 08:47:32,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921993980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:32,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492780213] [2021-10-28 08:47:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:32,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:32,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:32,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:47:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:47:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:32,974 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 08:47:32,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492780213] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:32,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:32,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-28 08:47:32,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949247135] [2021-10-28 08:47:32,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:47:32,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:47:32,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:47:32,978 INFO L87 Difference]: Start difference. First operand 1321 states and 1746 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 08:47:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:41,859 INFO L93 Difference]: Finished difference Result 5435 states and 7408 transitions. [2021-10-28 08:47:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-10-28 08:47:41,860 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 08:47:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:41,899 INFO L225 Difference]: With dead ends: 5435 [2021-10-28 08:47:41,899 INFO L226 Difference]: Without dead ends: 5343 [2021-10-28 08:47:41,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-10-28 08:47:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-10-28 08:47:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4426. [2021-10-28 08:47:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 3518 states have (on average 1.3328595793064242) internal successors, (4689), 3956 states have internal predecessors, (4689), 340 states have call successors, (340), 298 states have call predecessors, (340), 557 states have return successors, (939), 171 states have call predecessors, (939), 339 states have call successors, (939) [2021-10-28 08:47:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 5968 transitions. [2021-10-28 08:47:42,144 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 5968 transitions. Word has length 60 [2021-10-28 08:47:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:42,145 INFO L470 AbstractCegarLoop]: Abstraction has 4426 states and 5968 transitions. [2021-10-28 08:47:42,145 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 08:47:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 5968 transitions. [2021-10-28 08:47:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:47:42,147 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:42,147 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 08:47:42,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-28 08:47:42,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:47:42,363 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 08:47:42,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-10-28 08:47:42,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:42,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516036424] [2021-10-28 08:47:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:42,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:47:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 08:47:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,599 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 08:47:42,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:42,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516036424] [2021-10-28 08:47:42,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516036424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:42,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192710508] [2021-10-28 08:47:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:42,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:42,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:42,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:42,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:47:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:42,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:47:42,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:43,169 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 08:47:43,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192710508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:43,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:43,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-10-28 08:47:43,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332691453] [2021-10-28 08:47:43,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 08:47:43,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 08:47:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:47:43,172 INFO L87 Difference]: Start difference. First operand 4426 states and 5968 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 08:47:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:44,850 INFO L93 Difference]: Finished difference Result 9129 states and 12769 transitions. [2021-10-28 08:47:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 08:47:44,851 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 08:47:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:44,929 INFO L225 Difference]: With dead ends: 9129 [2021-10-28 08:47:44,929 INFO L226 Difference]: Without dead ends: 9129 [2021-10-28 08:47:44,930 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 08:47:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-10-28 08:47:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7078. [2021-10-28 08:47:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 5734 states have (on average 1.3566445762120685) internal successors, (7779), 6356 states have internal predecessors, (7779), 508 states have call successors, (508), 466 states have call predecessors, (508), 825 states have return successors, (1407), 255 states have call predecessors, (1407), 507 states have call successors, (1407) [2021-10-28 08:47:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 9694 transitions. [2021-10-28 08:47:45,219 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 9694 transitions. Word has length 60 [2021-10-28 08:47:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:45,220 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 9694 transitions. [2021-10-28 08:47:45,221 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 08:47:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 9694 transitions. [2021-10-28 08:47:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 08:47:45,224 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:45,224 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 08:47:45,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:45,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:47:45,439 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-10-28 08:47:45,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:45,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731200908] [2021-10-28 08:47:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:45,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:47:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 08:47:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-28 08:47:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:45,719 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 08:47:45,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:45,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731200908] [2021-10-28 08:47:45,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731200908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:45,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457520408] [2021-10-28 08:47:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:45,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:45,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:45,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:47:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:46,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:47:46,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:46,322 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 08:47:46,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457520408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:46,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:46,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-10-28 08:47:46,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936425289] [2021-10-28 08:47:46,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:47:46,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:46,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:47:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:47:46,326 INFO L87 Difference]: Start difference. First operand 7078 states and 9694 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 08:47:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:48,192 INFO L93 Difference]: Finished difference Result 9161 states and 12559 transitions. [2021-10-28 08:47:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 08:47:48,192 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 08:47:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:48,240 INFO L225 Difference]: With dead ends: 9161 [2021-10-28 08:47:48,240 INFO L226 Difference]: Without dead ends: 9075 [2021-10-28 08:47:48,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 08:47:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2021-10-28 08:47:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 8506. [2021-10-28 08:47:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 6792 states have (on average 1.3308303886925794) internal successors, (9039), 7616 states have internal predecessors, (9039), 676 states have call successors, (676), 550 states have call predecessors, (676), 1027 states have return successors, (1959), 339 states have call predecessors, (1959), 675 states have call successors, (1959) [2021-10-28 08:47:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11674 transitions. [2021-10-28 08:47:48,515 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11674 transitions. Word has length 71 [2021-10-28 08:47:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:48,515 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 11674 transitions. [2021-10-28 08:47:48,516 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 08:47:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11674 transitions. [2021-10-28 08:47:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 08:47:48,521 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:48,521 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 08:47:48,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:48,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:48,736 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-10-28 08:47:48,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:48,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058986225] [2021-10-28 08:47:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:48,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:47:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:47:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-10-28 08:47:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-10-28 08:47:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:48,987 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 08:47:48,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:48,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058986225] [2021-10-28 08:47:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058986225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:48,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559851578] [2021-10-28 08:47:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:48,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:48,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:49,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:47:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:47:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:49,629 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 08:47:49,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559851578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:49,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:49,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-10-28 08:47:49,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294358441] [2021-10-28 08:47:49,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:47:49,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:47:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:47:49,631 INFO L87 Difference]: Start difference. First operand 8506 states and 11674 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 08:47:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:50,662 INFO L93 Difference]: Finished difference Result 11210 states and 15593 transitions. [2021-10-28 08:47:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 08:47:50,663 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 08:47:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:50,704 INFO L225 Difference]: With dead ends: 11210 [2021-10-28 08:47:50,704 INFO L226 Difference]: Without dead ends: 11210 [2021-10-28 08:47:50,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:47:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11210 states. [2021-10-28 08:47:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11210 to 8506. [2021-10-28 08:47:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 6792 states have (on average 1.3308303886925794) internal successors, (9039), 7616 states have internal predecessors, (9039), 676 states have call successors, (676), 550 states have call predecessors, (676), 1027 states have return successors, (1959), 339 states have call predecessors, (1959), 675 states have call successors, (1959) [2021-10-28 08:47:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11674 transitions. [2021-10-28 08:47:51,013 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11674 transitions. Word has length 82 [2021-10-28 08:47:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:51,014 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 11674 transitions. [2021-10-28 08:47:51,014 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 08:47:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11674 transitions. [2021-10-28 08:47:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 08:47:51,023 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:51,023 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 08:47:51,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:51,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:51,243 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:47:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-10-28 08:47:51,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:51,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709069466] [2021-10-28 08:47:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:51,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:47:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 08:47:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-28 08:47:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-10-28 08:47:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,504 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 08:47:51,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:51,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709069466] [2021-10-28 08:47:51,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709069466] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:51,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63465528] [2021-10-28 08:47:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:51,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:51,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:51,507 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:51,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:47:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:47:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:52,317 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 08:47:52,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63465528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:52,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:52,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-28 08:47:52,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028053229] [2021-10-28 08:47:52,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:47:52,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:47:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:47:52,320 INFO L87 Difference]: Start difference. First operand 8506 states and 11674 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 08:47:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:55,187 INFO L93 Difference]: Finished difference Result 13729 states and 18929 transitions. [2021-10-28 08:47:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-28 08:47:55,188 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 08:47:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:55,266 INFO L225 Difference]: With dead ends: 13729 [2021-10-28 08:47:55,266 INFO L226 Difference]: Without dead ends: 13093 [2021-10-28 08:47:55,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 08:47:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13093 states. [2021-10-28 08:47:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13093 to 8840. [2021-10-28 08:47:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8840 states, 7064 states have (on average 1.3180917327293318) internal successors, (9311), 7908 states have internal predecessors, (9311), 676 states have call successors, (676), 592 states have call predecessors, (676), 1089 states have return successors, (2001), 339 states have call predecessors, (2001), 675 states have call successors, (2001) [2021-10-28 08:47:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8840 states to 8840 states and 11988 transitions. [2021-10-28 08:47:55,575 INFO L78 Accepts]: Start accepts. Automaton has 8840 states and 11988 transitions. Word has length 84 [2021-10-28 08:47:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:55,575 INFO L470 AbstractCegarLoop]: Abstraction has 8840 states and 11988 transitions. [2021-10-28 08:47:55,575 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 08:47:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8840 states and 11988 transitions. [2021-10-28 08:47:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 08:47:55,578 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:55,578 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 08:47:55,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:55,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:55,796 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 08:47:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:55,797 INFO L85 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-10-28 08:47:55,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:55,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307476840] [2021-10-28 08:47:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:55,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:55,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:47:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:47:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 08:47:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:56,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-28 08:47:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-28 08:47:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:56,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 08:47:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:56,070 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 08:47:56,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:56,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307476840] [2021-10-28 08:47:56,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307476840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:56,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916544739] [2021-10-28 08:47:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:56,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:56,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:56,073 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:56,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:47:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:47:56,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:56,828 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 08:47:56,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916544739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:56,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:56,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-28 08:47:56,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585706131] [2021-10-28 08:47:56,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:47:56,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:47:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:47:56,832 INFO L87 Difference]: Start difference. First operand 8840 states and 11988 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 08:47:58,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:58,179 INFO L93 Difference]: Finished difference Result 7383 states and 9497 transitions. [2021-10-28 08:47:58,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 08:47:58,179 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 08:47:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:58,201 INFO L225 Difference]: With dead ends: 7383 [2021-10-28 08:47:58,201 INFO L226 Difference]: Without dead ends: 6879 [2021-10-28 08:47:58,202 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 08:47:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6879 states. [2021-10-28 08:47:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6879 to 6570. [2021-10-28 08:47:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 5270 states have (on average 1.276470588235294) internal successors, (6727), 5848 states have internal predecessors, (6727), 508 states have call successors, (508), 466 states have call predecessors, (508), 781 states have return successors, (1239), 255 states have call predecessors, (1239), 507 states have call successors, (1239) [2021-10-28 08:47:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 8474 transitions. [2021-10-28 08:47:58,382 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 8474 transitions. Word has length 84 [2021-10-28 08:47:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:58,382 INFO L470 AbstractCegarLoop]: Abstraction has 6570 states and 8474 transitions. [2021-10-28 08:47:58,383 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 08:47:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 8474 transitions. [2021-10-28 08:47:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 08:47:58,385 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:58,385 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 08:47:58,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:58,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 08:47:58,611 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 08:47:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-10-28 08:47:58,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:58,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220452709] [2021-10-28 08:47:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:58,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:47:58,657 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:47:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:47:58,775 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:47:58,776 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:47:58,777 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:47:58,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-28 08:47:58,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-28 08:47:58,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-28 08:47:58,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-28 08:47:58,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-28 08:47:58,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-28 08:47:58,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-28 08:47:58,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-28 08:47:58,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-28 08:47:58,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-28 08:47:58,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-28 08:47:58,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-28 08:47:58,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-28 08:47:58,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-28 08:47:58,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:47:58,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:47:58,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:47:58,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:47:58,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:47:58,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 08:47:58,788 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] [2021-10-28 08:47:58,792 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:47:58,873 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:47:58,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:47:58 BoogieIcfgContainer [2021-10-28 08:47:58,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:47:58,935 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:47:58,935 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:47:58,939 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:47:58,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:14" (3/4) ... [2021-10-28 08:47:58,945 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:47:58,946 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:47:58,947 INFO L168 Benchmark]: Toolchain (without parser) took 46132.23 ms. Allocated memory was 107.0 MB in the beginning and 417.3 MB in the end (delta: 310.4 MB). Free memory was 86.7 MB in the beginning and 234.2 MB in the end (delta: -147.4 MB). Peak memory consumption was 161.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:47:58,947 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 79.7 MB. Free memory was 60.6 MB in the beginning and 60.5 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:47:58,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 520.68 ms. Allocated memory is still 107.0 MB. Free memory was 86.7 MB in the beginning and 74.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:47:58,948 INFO L168 Benchmark]: Boogie Preprocessor took 82.00 ms. Allocated memory is still 107.0 MB. Free memory was 74.4 MB in the beginning and 71.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:47:58,948 INFO L168 Benchmark]: RCFGBuilder took 701.04 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 47.4 MB in the end (delta: 24.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:47:58,948 INFO L168 Benchmark]: TraceAbstraction took 44807.76 ms. Allocated memory was 107.0 MB in the beginning and 417.3 MB in the end (delta: 310.4 MB). Free memory was 47.1 MB in the beginning and 235.2 MB in the end (delta: -188.1 MB). Peak memory consumption was 265.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:47:58,949 INFO L168 Benchmark]: Witness Printer took 11.14 ms. Allocated memory is still 417.3 MB. Free memory was 235.2 MB in the beginning and 234.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:47:58,951 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 79.7 MB. Free memory was 60.6 MB in the beginning and 60.5 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 520.68 ms. Allocated memory is still 107.0 MB. Free memory was 86.7 MB in the beginning and 74.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 82.00 ms. Allocated memory is still 107.0 MB. Free memory was 74.4 MB in the beginning and 71.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 701.04 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 47.4 MB in the end (delta: 24.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 44807.76 ms. Allocated memory was 107.0 MB in the beginning and 417.3 MB in the end (delta: 310.4 MB). Free memory was 47.1 MB in the beginning and 235.2 MB in the end (delta: -188.1 MB). Peak memory consumption was 265.9 MB. Max. memory is 16.1 GB. * Witness Printer took 11.14 ms. Allocated memory is still 417.3 MB. Free memory was 235.2 MB in the beginning and 234.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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)=49, \old(garbage)=54, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=57, \old(S)=55, \old(t1)=62, \old(t1)=70, \old(t4)=58, \old(t4)=53, \old(x1)=61, \old(x1)=74, \old(x4)=51, \old(x4)=68, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \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}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __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] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \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] COND TRUE 1 != pc1 || 1 != pc4 || __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)=0, \old(x1)=-1, \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] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \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] COND TRUE 1 != pc1 || 1 != pc4 || __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)=0, \old(x1)=-1, \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] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \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] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [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] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \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] COND TRUE 1 != pc1 || 1 != pc4 || __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)=0, \old(x1)=-1, \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] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \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] COND TRUE 1 != pc1 || 1 != pc4 || __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)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, 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: [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)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc1++=6, pc4=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=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=0, \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=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __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=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\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=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 44.5s, OverallIterations: 23, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 27.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1947 SDtfs, 6771 SDslu, 4282 SDs, 0 SdLazy, 13799 SolverSat, 2709 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1494 GetRequests, 891 SyntacticMatches, 2 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14297 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8840occurred in iteration=21, InterpolantAutomatonStates: 533, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 12685 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1594 NumberOfCodeBlocks, 1594 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1474 ConstructedInterpolants, 0 QuantifiedInterpolants, 6919 SizeOfPredicates, 58 NumberOfNonLiveVariables, 6597 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 1332/1656 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 08:47:58,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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 08:48:01,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:48:01,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:48:01,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:48:01,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:48:01,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:48:01,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:48:01,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:48:01,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:48:01,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:48:01,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:48:01,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:48:01,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:48:01,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:48:01,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:48:01,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:48:01,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:48:01,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:48:01,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:48:01,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:48:01,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:48:01,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:48:01,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:48:01,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:48:01,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:48:01,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:48:01,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:48:01,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:48:01,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:48:01,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:48:01,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:48:01,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:48:01,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:48:01,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:48:01,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:48:01,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:48:01,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:48:01,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:48:01,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:48:01,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:48:01,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:48:01,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 08:48:01,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:48:01,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:48:01,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:48:01,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:48:01,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:48:01,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:48:01,622 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:48:01,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:48:01,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:48:01,623 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:48:01,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:48:01,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:48:01,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:48:01,625 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:48:01,626 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:48:01,626 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:48:01,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:48:01,627 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:48:01,627 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 08:48:01,627 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 08:48:01,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:48:01,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:48:01,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:48:01,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:48:01,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:48:01,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:48:01,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:48:01,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:48:01,630 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 08:48:01,630 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 08:48:01,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:48:01,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 08:48:01,631 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_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f [2021-10-28 08:48:01,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:48:02,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:48:02,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:48:02,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:48:02,017 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:48:02,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-28 08:48:02,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/295709f02/d16c1b69726c4bc3ba60bab0112dfb28/FLAG44beed5b8 [2021-10-28 08:48:02,761 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:48:02,761 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-28 08:48:02,777 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/295709f02/d16c1b69726c4bc3ba60bab0112dfb28/FLAG44beed5b8 [2021-10-28 08:48:03,040 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/data/295709f02/d16c1b69726c4bc3ba60bab0112dfb28 [2021-10-28 08:48:03,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:48:03,057 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:48:03,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:48:03,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:48:03,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:48:03,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3408035c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03, skipping insertion in model container [2021-10-28 08:48:03,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:48:03,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:48:03,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:48:03,516 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:48:03,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:48:03,649 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:48:03,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03 WrapperNode [2021-10-28 08:48:03,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:48:03,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:48:03,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:48:03,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:48:03,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:48:03,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:48:03,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:48:03,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:48:03,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (1/1) ... [2021-10-28 08:48:03,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:48:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:03,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:48:03,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:48:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:48:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:48:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 08:48:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:48:03,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:48:03,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:48:03,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:48:03,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:48:03,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:48:03,875 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-28 08:48:03,875 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-28 08:48:03,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:48:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:48:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:48:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:48:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:48:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:48:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:48:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:48:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:48:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:48:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:48:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:48:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:48:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:48:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:48:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:48:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:48:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:48:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:48:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:48:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:48:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:48:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:48:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:48:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:48:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:48:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:48:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:48:03,888 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:48:03,888 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:48:03,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:48:03,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:48:03,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:48:03,888 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:48:03,889 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:48:03,889 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:48:03,889 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:48:03,890 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:48:03,890 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:48:03,890 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:48:03,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:48:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:48:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:48:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:48:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:48:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:48:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:48:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:48:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:48:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:48:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:48:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:48:03,894 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:48:03,894 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:48:03,895 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:48:03,896 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:48:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:48:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:48:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:48:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:48:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:48:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:48:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:48:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:48:03,903 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:48:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:48:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:48:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:48:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:48:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:48:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:48:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:48:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:48:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:48:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:48:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:48:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:48:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:48:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:48:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:48:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:48:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:48:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:48:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:48:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:48:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:48:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:48:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:48:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:48:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:48:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:48:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:48:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:48:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:48:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:48:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:48:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:48:03,915 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:48:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:48:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:48:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:48:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:48:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:48:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:48:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:48:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:48:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:48:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:48:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:48:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:48:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:48:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:48:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:48:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:48:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-28 08:48:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:48:03,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 08:48:03,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:48:03,923 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-28 08:48:03,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:48:03,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 08:48:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:48:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:48:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:48:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 08:48:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:48:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 08:48:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 08:48:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 08:48:04,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:48:04,690 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:48:04,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:48:04 BoogieIcfgContainer [2021-10-28 08:48:04,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:48:04,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:48:04,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:48:04,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:48:04,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:48:03" (1/3) ... [2021-10-28 08:48:04,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bcc359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:48:04, skipping insertion in model container [2021-10-28 08:48:04,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:48:03" (2/3) ... [2021-10-28 08:48:04,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bcc359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:48:04, skipping insertion in model container [2021-10-28 08:48:04,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:48:04" (3/3) ... [2021-10-28 08:48:04,709 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2021-10-28 08:48:04,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:48:04,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 08:48:04,760 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:48:04,766 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 08:48:04,766 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 08:48:04,781 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 08:48:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:48:04,789 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:04,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:04,790 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-10-28 08:48:04,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:04,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282244968] [2021-10-28 08:48:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:04,809 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:04,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:04,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:04,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 08:48:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 08:48:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:05,085 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 08:48:05,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:05,131 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 08:48:05,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:05,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282244968] [2021-10-28 08:48:05,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282244968] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:05,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:05,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:48:05,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635551077] [2021-10-28 08:48:05,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:48:05,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:48:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:48:05,161 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 08:48:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:05,193 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-28 08:48:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:48:05,194 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 08:48:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:05,206 INFO L225 Difference]: With dead ends: 72 [2021-10-28 08:48:05,207 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 08:48:05,208 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 08:48:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 08:48:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 08:48:05,250 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 08:48:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-10-28 08:48:05,258 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-10-28 08:48:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:05,258 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-10-28 08:48:05,259 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 08:48:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-10-28 08:48:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:48:05,260 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:05,260 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:05,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-28 08:48:05,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:05,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-10-28 08:48:05,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:05,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796268188] [2021-10-28 08:48:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:05,474 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:05,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:05,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 08:48:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:48:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:05,772 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 08:48:05,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:05,884 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 08:48:05,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:05,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796268188] [2021-10-28 08:48:05,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796268188] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:05,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:05,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 08:48:05,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808402828] [2021-10-28 08:48:05,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:48:05,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:48:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:48:05,891 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 08:48:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:05,973 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-10-28 08:48:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:48:05,974 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 08:48:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:05,981 INFO L225 Difference]: With dead ends: 120 [2021-10-28 08:48:05,981 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 08:48:05,982 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 08:48:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 08:48:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-10-28 08:48:06,008 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 08:48:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-10-28 08:48:06,016 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-10-28 08:48:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:06,017 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-10-28 08:48:06,018 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 08:48:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-10-28 08:48:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:48:06,023 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:06,023 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:06,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-28 08:48:06,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:06,235 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 08:48:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-10-28 08:48:06,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:06,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603318427] [2021-10-28 08:48:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:06,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:06,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:06,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:06,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 08:48:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 08:48:06,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:06,458 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 08:48:06,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:06,494 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 08:48:06,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:06,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603318427] [2021-10-28 08:48:06,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603318427] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:06,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:06,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:48:06,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451655359] [2021-10-28 08:48:06,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:48:06,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:48:06,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:48:06,497 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 08:48:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:06,642 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-10-28 08:48:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:48:06,643 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 08:48:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:06,645 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:48:06,645 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 08:48:06,645 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 08:48:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 08:48:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-10-28 08:48:06,660 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 08:48:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-10-28 08:48:06,665 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-10-28 08:48:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:06,665 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-10-28 08:48:06,666 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 08:48:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-10-28 08:48:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:48:06,666 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:06,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:06,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:06,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:06,887 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-10-28 08:48:06,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:06,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531974340] [2021-10-28 08:48:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:06,889 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:06,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:06,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:06,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 08:48:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 08:48:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:07,120 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 08:48:07,126 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 08:48:07,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:07,156 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 08:48:07,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:07,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531974340] [2021-10-28 08:48:07,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531974340] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:07,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:07,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:48:07,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125554834] [2021-10-28 08:48:07,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:48:07,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:48:07,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:48:07,159 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 08:48:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:07,313 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-10-28 08:48:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:48:07,316 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 08:48:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:07,318 INFO L225 Difference]: With dead ends: 198 [2021-10-28 08:48:07,319 INFO L226 Difference]: Without dead ends: 198 [2021-10-28 08:48:07,319 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 08:48:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-28 08:48:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-28 08:48:07,347 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 08:48:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-10-28 08:48:07,351 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-10-28 08:48:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:07,351 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-10-28 08:48:07,352 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 08:48:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-10-28 08:48:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:48:07,353 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:07,353 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:07,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:07,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:07,568 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-10-28 08:48:07,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:07,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787764126] [2021-10-28 08:48:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:07,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:07,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:07,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 08:48:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:07,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:48:07,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:07,788 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 08:48:07,802 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 08:48:07,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:07,881 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 08:48:07,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:07,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787764126] [2021-10-28 08:48:07,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787764126] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:07,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:07,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-28 08:48:07,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413265284] [2021-10-28 08:48:07,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:07,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:07,884 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 08:48:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:08,216 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-10-28 08:48:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:48:08,217 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 08:48:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:08,221 INFO L225 Difference]: With dead ends: 333 [2021-10-28 08:48:08,221 INFO L226 Difference]: Without dead ends: 333 [2021-10-28 08:48:08,222 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 08:48:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-10-28 08:48:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-10-28 08:48:08,249 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 08:48:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-10-28 08:48:08,252 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-10-28 08:48:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:08,253 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-10-28 08:48:08,253 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 08:48:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-10-28 08:48:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:48:08,254 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:08,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:08,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:08,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:08,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-10-28 08:48:08,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:08,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074727980] [2021-10-28 08:48:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:08,467 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:08,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:08,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:08,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 08:48:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:48:08,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:08,691 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 08:48:08,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:08,743 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 08:48:08,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:08,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074727980] [2021-10-28 08:48:08,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074727980] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:08,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:08,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 08:48:08,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627606906] [2021-10-28 08:48:08,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:08,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:08,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:08,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:08,748 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 08:48:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:08,787 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-10-28 08:48:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:48:08,788 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 08:48:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:08,790 INFO L225 Difference]: With dead ends: 197 [2021-10-28 08:48:08,790 INFO L226 Difference]: Without dead ends: 197 [2021-10-28 08:48:08,790 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 08:48:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-28 08:48:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-10-28 08:48:08,817 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 08:48:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-10-28 08:48:08,819 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-10-28 08:48:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:08,820 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-10-28 08:48:08,820 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 08:48:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-10-28 08:48:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:48:08,821 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:08,822 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:08,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:09,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:09,034 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-10-28 08:48:09,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:09,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529105332] [2021-10-28 08:48:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:09,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:09,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:09,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 08:48:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:48:09,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:09,263 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 08:48:09,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:09,317 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 08:48:09,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:09,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529105332] [2021-10-28 08:48:09,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529105332] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:48:09,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:48:09,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 08:48:09,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980968345] [2021-10-28 08:48:09,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:48:09,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:48:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:48:09,320 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 08:48:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:09,364 INFO L93 Difference]: Finished difference Result 281 states and 404 transitions. [2021-10-28 08:48:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:48:09,365 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 08:48:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:09,368 INFO L225 Difference]: With dead ends: 281 [2021-10-28 08:48:09,368 INFO L226 Difference]: Without dead ends: 281 [2021-10-28 08:48:09,369 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 08:48:09,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-10-28 08:48:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-10-28 08:48:09,382 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 08:48:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-10-28 08:48:09,385 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-10-28 08:48:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:09,386 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-10-28 08:48:09,386 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 08:48:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-10-28 08:48:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:48:09,387 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:09,387 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 08:48:09,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:09,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:09,600 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 08:48:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-10-28 08:48:09,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:09,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397982612] [2021-10-28 08:48:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:09,601 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:09,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:09,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 08:48:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:09,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:48:09,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:09,919 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 08:48:09,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:10,137 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 08:48:10,137 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:10,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397982612] [2021-10-28 08:48:10,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397982612] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:10,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:10,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 08:48:10,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453985026] [2021-10-28 08:48:10,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:48:10,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:48:10,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:48:10,140 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 08:48:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:10,933 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-10-28 08:48:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:48:10,934 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 08:48:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:10,939 INFO L225 Difference]: With dead ends: 690 [2021-10-28 08:48:10,939 INFO L226 Difference]: Without dead ends: 690 [2021-10-28 08:48:10,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:48:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-28 08:48:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-10-28 08:48:10,970 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 08:48:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-10-28 08:48:10,975 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-10-28 08:48:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:10,975 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-10-28 08:48:10,976 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 08:48:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-10-28 08:48:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:48:10,977 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:10,977 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:10,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:11,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:11,188 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-10-28 08:48:11,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:11,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738516431] [2021-10-28 08:48:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:11,188 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:11,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:11,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:11,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 08:48:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:48:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:11,545 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 08:48:11,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:11,727 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 08:48:11,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:11,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738516431] [2021-10-28 08:48:11,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738516431] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:11,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:11,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 08:48:11,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303784239] [2021-10-28 08:48:11,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:48:11,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:48:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:48:11,730 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 08:48:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:12,386 INFO L93 Difference]: Finished difference Result 909 states and 1312 transitions. [2021-10-28 08:48:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:48:12,392 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 08:48:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:12,401 INFO L225 Difference]: With dead ends: 909 [2021-10-28 08:48:12,401 INFO L226 Difference]: Without dead ends: 909 [2021-10-28 08:48:12,401 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 08:48:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-10-28 08:48:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 837. [2021-10-28 08:48:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 666 states have (on average 1.5015015015015014) internal successors, (1000), 738 states have internal predecessors, (1000), 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 08:48:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1189 transitions. [2021-10-28 08:48:12,458 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1189 transitions. Word has length 20 [2021-10-28 08:48:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:12,459 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1189 transitions. [2021-10-28 08:48:12,459 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 08:48:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1189 transitions. [2021-10-28 08:48:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:48:12,468 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:12,468 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:12,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:12,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:12,681 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-10-28 08:48:12,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:12,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498431261] [2021-10-28 08:48:12,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:48:12,682 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:12,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:12,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-28 08:48:12,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:48:12,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:12,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:48:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:13,098 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 08:48:13,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:13,264 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 08:48:13,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:13,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498431261] [2021-10-28 08:48:13,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498431261] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:13,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:13,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-28 08:48:13,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708577830] [2021-10-28 08:48:13,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:48:13,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:48:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:48:13,267 INFO L87 Difference]: Start difference. First operand 837 states and 1189 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 08:48:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:13,526 INFO L93 Difference]: Finished difference Result 1159 states and 1597 transitions. [2021-10-28 08:48:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:48:13,528 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 08:48:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:13,534 INFO L225 Difference]: With dead ends: 1159 [2021-10-28 08:48:13,535 INFO L226 Difference]: Without dead ends: 1159 [2021-10-28 08:48:13,535 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 08:48:13,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-10-28 08:48:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1147. [2021-10-28 08:48:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 908 states have (on average 1.4405286343612336) internal successors, (1308), 1016 states have internal predecessors, (1308), 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 08:48:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1585 transitions. [2021-10-28 08:48:13,579 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1585 transitions. Word has length 27 [2021-10-28 08:48:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:13,580 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1585 transitions. [2021-10-28 08:48:13,580 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 08:48:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1585 transitions. [2021-10-28 08:48:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:48:13,582 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:13,582 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 08:48:13,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:13,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:13,795 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:48:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:13,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-10-28 08:48:13,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:13,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148175576] [2021-10-28 08:48:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:13,796 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:13,797 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:13,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-28 08:48:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:14,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:48:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:14,386 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 08:48:14,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:14,831 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 08:48:14,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:14,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148175576] [2021-10-28 08:48:14,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148175576] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:14,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:14,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-28 08:48:14,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608124720] [2021-10-28 08:48:14,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:48:14,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:48:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:48:14,833 INFO L87 Difference]: Start difference. First operand 1147 states and 1585 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 08:48:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:15,757 INFO L93 Difference]: Finished difference Result 1680 states and 2280 transitions. [2021-10-28 08:48:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:48:15,758 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 08:48:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:15,772 INFO L225 Difference]: With dead ends: 1680 [2021-10-28 08:48:15,772 INFO L226 Difference]: Without dead ends: 1680 [2021-10-28 08:48:15,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:48:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-10-28 08:48:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-10-28 08:48:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1157 states have (on average 1.4079515989628348) internal successors, (1629), 1297 states have internal predecessors, (1629), 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 08:48:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2001 transitions. [2021-10-28 08:48:15,858 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2001 transitions. Word has length 29 [2021-10-28 08:48:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:15,859 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2001 transitions. [2021-10-28 08:48:15,859 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 08:48:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2001 transitions. [2021-10-28 08:48:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:48:15,861 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:15,861 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 08:48:15,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:16,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:16,074 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 08:48:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:16,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-10-28 08:48:16,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:16,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915507616] [2021-10-28 08:48:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:16,075 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:16,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:16,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-28 08:48:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:16,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:48:16,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:16,516 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 08:48:16,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:16,823 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 08:48:16,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:16,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915507616] [2021-10-28 08:48:16,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915507616] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:16,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:16,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-10-28 08:48:16,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112003932] [2021-10-28 08:48:16,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:48:16,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:16,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:48:16,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:48:16,825 INFO L87 Difference]: Start difference. First operand 1467 states and 2001 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 08:48:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:17,826 INFO L93 Difference]: Finished difference Result 1681 states and 2135 transitions. [2021-10-28 08:48:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:48:17,827 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 08:48:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:17,836 INFO L225 Difference]: With dead ends: 1681 [2021-10-28 08:48:17,836 INFO L226 Difference]: Without dead ends: 1497 [2021-10-28 08:48:17,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:48:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-10-28 08:48:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-10-28 08:48:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1071 states have (on average 1.373482726423903) internal successors, (1471), 1209 states have internal predecessors, (1471), 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 08:48:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1815 transitions. [2021-10-28 08:48:17,900 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1815 transitions. Word has length 30 [2021-10-28 08:48:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:17,901 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1815 transitions. [2021-10-28 08:48:17,901 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 08:48:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1815 transitions. [2021-10-28 08:48:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:48:17,902 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:17,902 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 08:48:17,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:18,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:18,116 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 08:48:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-10-28 08:48:18,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:18,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114556910] [2021-10-28 08:48:18,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:48:18,118 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:18,119 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:18,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-28 08:48:18,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:48:18,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:48:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:18,621 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 08:48:18,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:18,946 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 08:48:18,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:18,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114556910] [2021-10-28 08:48:18,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114556910] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:18,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:18,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-10-28 08:48:18,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296875078] [2021-10-28 08:48:18,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:48:18,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:48:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:48:18,949 INFO L87 Difference]: Start difference. First operand 1379 states and 1815 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 08:48:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:20,233 INFO L93 Difference]: Finished difference Result 2266 states and 3046 transitions. [2021-10-28 08:48:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:48:20,234 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 08:48:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:20,249 INFO L225 Difference]: With dead ends: 2266 [2021-10-28 08:48:20,249 INFO L226 Difference]: Without dead ends: 2170 [2021-10-28 08:48:20,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:48:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-10-28 08:48:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-10-28 08:48:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1543 states have (on average 1.404406999351912) internal successors, (2167), 1753 states have internal predecessors, (2167), 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 08:48:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2753 transitions. [2021-10-28 08:48:20,344 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2753 transitions. Word has length 39 [2021-10-28 08:48:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:20,345 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2753 transitions. [2021-10-28 08:48:20,345 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 08:48:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2753 transitions. [2021-10-28 08:48:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:48:20,348 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:20,348 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 08:48:20,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:20,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:20,561 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 08:48:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-10-28 08:48:20,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:20,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207347525] [2021-10-28 08:48:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:20,563 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:20,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:20,564 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:20,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-28 08:48:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:48:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:21,154 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 08:48:21,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:21,609 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 08:48:21,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:21,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207347525] [2021-10-28 08:48:21,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207347525] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:21,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:21,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-28 08:48:21,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997498300] [2021-10-28 08:48:21,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:48:21,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:48:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:48:21,612 INFO L87 Difference]: Start difference. First operand 1993 states and 2753 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 08:48:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:23,056 INFO L93 Difference]: Finished difference Result 2261 states and 2959 transitions. [2021-10-28 08:48:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:48:23,057 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 08:48:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:23,070 INFO L225 Difference]: With dead ends: 2261 [2021-10-28 08:48:23,070 INFO L226 Difference]: Without dead ends: 2089 [2021-10-28 08:48:23,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:48:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-10-28 08:48:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-10-28 08:48:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1469 states have (on average 1.3839346494213751) internal successors, (2033), 1677 states have internal predecessors, (2033), 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 08:48:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2591 transitions. [2021-10-28 08:48:23,166 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2591 transitions. Word has length 39 [2021-10-28 08:48:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:23,168 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2591 transitions. [2021-10-28 08:48:23,169 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 08:48:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2591 transitions. [2021-10-28 08:48:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:48:23,170 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:23,170 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 08:48:23,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:23,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:23,387 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 08:48:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:23,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-10-28 08:48:23,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:23,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775550120] [2021-10-28 08:48:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:23,388 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:23,389 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:23,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-28 08:48:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:23,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 08:48:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:24,211 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 08:48:24,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:25,804 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 08:48:25,805 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775550120] [2021-10-28 08:48:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775550120] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:25,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:25,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-10-28 08:48:25,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366268522] [2021-10-28 08:48:25,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 08:48:25,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:25,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 08:48:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-10-28 08:48:25,807 INFO L87 Difference]: Start difference. First operand 1917 states and 2591 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 08:48:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:30,837 INFO L93 Difference]: Finished difference Result 3752 states and 4898 transitions. [2021-10-28 08:48:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 08:48:30,844 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 08:48:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:30,872 INFO L225 Difference]: With dead ends: 3752 [2021-10-28 08:48:30,873 INFO L226 Difference]: Without dead ends: 3716 [2021-10-28 08:48:30,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-10-28 08:48:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-10-28 08:48:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-10-28 08:48:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2325 states have (on average 1.3320430107526882) internal successors, (3097), 2625 states have internal predecessors, (3097), 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 08:48:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4019 transitions. [2021-10-28 08:48:31,024 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4019 transitions. Word has length 45 [2021-10-28 08:48:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:31,025 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4019 transitions. [2021-10-28 08:48:31,025 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 08:48:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4019 transitions. [2021-10-28 08:48:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 08:48:31,028 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:31,028 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 08:48:31,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:31,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:31,242 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 08:48:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-10-28 08:48:31,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:31,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311881794] [2021-10-28 08:48:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:31,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:31,245 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:31,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-28 08:48:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 08:48:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:31,889 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 08:48:31,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:32,496 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 08:48:32,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:32,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311881794] [2021-10-28 08:48:32,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311881794] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:32,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:32,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-10-28 08:48:32,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714034463] [2021-10-28 08:48:32,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:48:32,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:48:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:48:32,499 INFO L87 Difference]: Start difference. First operand 3017 states and 4019 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 08:48:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:34,260 INFO L93 Difference]: Finished difference Result 4090 states and 5250 transitions. [2021-10-28 08:48:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:48:34,266 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 08:48:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:34,289 INFO L225 Difference]: With dead ends: 4090 [2021-10-28 08:48:34,289 INFO L226 Difference]: Without dead ends: 3950 [2021-10-28 08:48:34,290 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 08:48:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-10-28 08:48:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-10-28 08:48:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2853 states have (on average 1.3126533473536628) internal successors, (3745), 3219 states have internal predecessors, (3745), 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 08:48:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4850 transitions. [2021-10-28 08:48:34,412 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4850 transitions. Word has length 48 [2021-10-28 08:48:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:34,413 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4850 transitions. [2021-10-28 08:48:34,413 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 08:48:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4850 transitions. [2021-10-28 08:48:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 08:48:34,415 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:34,415 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 08:48:34,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:34,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:34,632 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 08:48:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:34,632 INFO L85 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-10-28 08:48:34,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:34,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708410233] [2021-10-28 08:48:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:34,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:34,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:34,635 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:34,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-28 08:48:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:48:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:48:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:35,465 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 08:48:35,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:36,226 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 08:48:36,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:36,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708410233] [2021-10-28 08:48:36,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708410233] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:36,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:36,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-10-28 08:48:36,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108258486] [2021-10-28 08:48:36,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 08:48:36,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:36,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 08:48:36,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:48:36,229 INFO L87 Difference]: Start difference. First operand 3716 states and 4850 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 08:48:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:38,385 INFO L93 Difference]: Finished difference Result 4249 states and 5455 transitions. [2021-10-28 08:48:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 08:48:38,385 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 08:48:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:38,411 INFO L225 Difference]: With dead ends: 4249 [2021-10-28 08:48:38,411 INFO L226 Difference]: Without dead ends: 4177 [2021-10-28 08:48:38,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 08:48:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-10-28 08:48:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-10-28 08:48:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3083 states have (on average 1.3100875770353553) internal successors, (4039), 3485 states have internal predecessors, (4039), 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 08:48:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5221 transitions. [2021-10-28 08:48:38,564 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5221 transitions. Word has length 59 [2021-10-28 08:48:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5221 transitions. [2021-10-28 08:48:38,565 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 08:48:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5221 transitions. [2021-10-28 08:48:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 08:48:38,567 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:38,567 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 08:48:38,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:38,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:38,785 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 08:48:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-10-28 08:48:38,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:38,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567108352] [2021-10-28 08:48:38,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:48:38,786 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:38,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:38,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:38,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-28 08:48:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:48:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 08:48:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:40,069 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 08:48:40,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:42,259 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 08:48:42,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:42,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567108352] [2021-10-28 08:48:42,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567108352] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:42,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:42,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-10-28 08:48:42,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901473290] [2021-10-28 08:48:42,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 08:48:42,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:42,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 08:48:42,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:48:42,264 INFO L87 Difference]: Start difference. First operand 4017 states and 5221 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 08:48:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:49,683 INFO L93 Difference]: Finished difference Result 7214 states and 9438 transitions. [2021-10-28 08:48:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 08:48:49,684 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 08:48:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:49,731 INFO L225 Difference]: With dead ends: 7214 [2021-10-28 08:48:49,731 INFO L226 Difference]: Without dead ends: 7154 [2021-10-28 08:48:49,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 08:48:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-10-28 08:48:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-10-28 08:48:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3907 states have (on average 1.3112362426414128) internal successors, (5123), 4429 states have internal predecessors, (5123), 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 08:48:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6601 transitions. [2021-10-28 08:48:49,966 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6601 transitions. Word has length 70 [2021-10-28 08:48:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:49,967 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6601 transitions. [2021-10-28 08:48:49,967 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 08:48:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6601 transitions. [2021-10-28 08:48:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 08:48:49,969 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:49,969 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 08:48:49,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:50,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:50,185 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 08:48:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-10-28 08:48:50,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:50,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629213338] [2021-10-28 08:48:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:50,186 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:50,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:50,188 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:50,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-28 08:48:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:48:50,879 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:48:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:48:51,160 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 08:48:51,160 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:48:51,161 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:48:51,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-28 08:48:51,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-28 08:48:51,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-28 08:48:51,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-28 08:48:51,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-28 08:48:51,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-28 08:48:51,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-28 08:48:51,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-28 08:48:51,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-28 08:48:51,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-28 08:48:51,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-28 08:48:51,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-28 08:48:51,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-28 08:48:51,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-28 08:48:51,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:48:51,167 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:48:51,167 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:48:51,167 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:48:51,167 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:48:51,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:51,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:51,386 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:51,392 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:48:51,463 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:48:51,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:48:51 BoogieIcfgContainer [2021-10-28 08:48:51,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:48:51,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:48:51,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:48:51,553 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:48:51,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:48:04" (3/4) ... [2021-10-28 08:48:51,557 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:48:51,563 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:48:51,564 INFO L168 Benchmark]: Toolchain (without parser) took 48506.07 ms. Allocated memory was 54.5 MB in the beginning and 211.8 MB in the end (delta: 157.3 MB). Free memory was 29.3 MB in the beginning and 69.2 MB in the end (delta: -39.9 MB). Peak memory consumption was 115.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:51,565 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 54.5 MB. Free memory is still 34.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:48:51,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 590.13 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 29.1 MB in the beginning and 43.2 MB in the end (delta: -14.1 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:51,565 INFO L168 Benchmark]: Boogie Preprocessor took 134.00 ms. Allocated memory is still 69.2 MB. Free memory was 43.2 MB in the beginning and 39.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:51,566 INFO L168 Benchmark]: RCFGBuilder took 905.15 ms. Allocated memory is still 69.2 MB. Free memory was 39.9 MB in the beginning and 29.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:51,567 INFO L168 Benchmark]: TraceAbstraction took 46849.35 ms. Allocated memory was 69.2 MB in the beginning and 211.8 MB in the end (delta: 142.6 MB). Free memory was 48.1 MB in the beginning and 70.3 MB in the end (delta: -22.1 MB). Peak memory consumption was 119.8 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:51,567 INFO L168 Benchmark]: Witness Printer took 10.35 ms. Allocated memory is still 211.8 MB. Free memory was 70.3 MB in the beginning and 69.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:48:51,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 54.5 MB. Free memory is still 34.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 590.13 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 29.1 MB in the beginning and 43.2 MB in the end (delta: -14.1 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 134.00 ms. Allocated memory is still 69.2 MB. Free memory was 43.2 MB in the beginning and 39.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 905.15 ms. Allocated memory is still 69.2 MB. Free memory was 39.9 MB in the beginning and 29.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 46849.35 ms. Allocated memory was 69.2 MB in the beginning and 211.8 MB in the end (delta: 142.6 MB). Free memory was 48.1 MB in the beginning and 70.3 MB in the end (delta: -22.1 MB). Peak memory consumption was 119.8 MB. Max. memory is 16.1 GB. * Witness Printer took 10.35 ms. Allocated memory is still 211.8 MB. Free memory was 70.3 MB in the beginning and 69.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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 1 != pc1 || 1 != pc4 || __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 1 != pc1 || 1 != pc4 || __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 1 != pc1 || 1 != pc4 || __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 1 != pc1 || 1 != pc4 || __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 1 != pc1 || 1 != pc4 || __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 1 != pc1 || 1 != pc4 || __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=1, res4=0, S={1:0}, 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: [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=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=1, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __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=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\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=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 46.6s, OverallIterations: 19, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 23.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2412 SDtfs, 14226 SDslu, 3700 SDs, 0 SdLazy, 10230 SolverSat, 3710 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1242 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5071occurred in iteration=18, InterpolantAutomatonStates: 335, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 4146 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 567 NumberOfCodeBlocks, 567 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 956 ConstructedInterpolants, 0 QuantifiedInterpolants, 5575 SizeOfPredicates, 63 NumberOfNonLiveVariables, 4143 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 36 InterpolantComputations, 14 PerfectInterpolantSequences, 291/834 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 08:48:51,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa3bdf1-0698-417a-ba5a-35ae38b565c7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...