./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_5.c --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_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/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_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/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_659d96cf-385d-413c-b828-cf1e34a4d7b4/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 3f68d39859f114df07f2619f37e3285dcdf00194e62a42552d2c67e537c13685 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:45:10,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:45:10,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:45:10,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:45:10,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:45:10,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:45:10,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:45:10,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:45:10,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:45:10,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:45:10,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:45:10,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:45:10,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:45:10,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:45:10,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:45:10,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:45:10,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:45:10,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:45:10,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:45:10,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:45:10,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:45:10,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:45:10,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:45:10,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:45:10,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:45:10,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:45:10,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:45:10,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:45:10,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:45:10,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:45:10,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:45:10,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:45:10,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:45:10,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:45:10,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:45:10,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:45:10,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:45:10,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:45:10,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:45:10,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:45:10,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:45:10,865 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:45:10,906 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:45:10,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:45:10,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:45:10,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:45:10,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:45:10,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:45:10,914 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:45:10,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:45:10,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:45:10,915 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:45:10,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:45:10,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:45:10,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:45:10,915 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:45:10,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:45:10,916 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:45:10,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:45:10,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:45:10,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:45:10,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:45:10,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:45:10,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:45:10,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:45:10,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:45:10,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:45:10,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:45:10,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:45:10,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:45:10,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:45:10,918 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_659d96cf-385d-413c-b828-cf1e34a4d7b4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f68d39859f114df07f2619f37e3285dcdf00194e62a42552d2c67e537c13685 [2021-10-28 09:45:11,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:45:11,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:45:11,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:45:11,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:45:11,248 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:45:11,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/locks/test_locks_5.c [2021-10-28 09:45:11,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/data/35a2f2cad/c262938611bc4d3c82e07c9823bbccac/FLAGc46ff81e4 [2021-10-28 09:45:11,749 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:45:11,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/sv-benchmarks/c/locks/test_locks_5.c [2021-10-28 09:45:11,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/data/35a2f2cad/c262938611bc4d3c82e07c9823bbccac/FLAGc46ff81e4 [2021-10-28 09:45:12,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/data/35a2f2cad/c262938611bc4d3c82e07c9823bbccac [2021-10-28 09:45:12,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:45:12,116 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:45:12,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:45:12,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:45:12,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:45:12,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c54ac19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12, skipping insertion in model container [2021-10-28 09:45:12,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:45:12,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:45:12,376 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/sv-benchmarks/c/locks/test_locks_5.c[2207,2220] [2021-10-28 09:45:12,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:45:12,399 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:45:12,417 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/sv-benchmarks/c/locks/test_locks_5.c[2207,2220] [2021-10-28 09:45:12,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:45:12,432 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:45:12,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12 WrapperNode [2021-10-28 09:45:12,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:45:12,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:45:12,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:45:12,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:45:12,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:45:12,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:45:12,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:45:12,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:45:12,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (1/1) ... [2021-10-28 09:45:12,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:45:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:12,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:45:12,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:45:12,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:45:12,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:45:12,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:45:12,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:45:12,549 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:45:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:45:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:45:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:45:12,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:45:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:45:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:45:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:45:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:45:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:45:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:45:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:45:12,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:45:12,927 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-28 09:45:12,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:45:12 BoogieIcfgContainer [2021-10-28 09:45:12,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:45:12,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:45:12,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:45:12,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:45:12,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:45:12" (1/3) ... [2021-10-28 09:45:12,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a65caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:45:12, skipping insertion in model container [2021-10-28 09:45:12,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:45:12" (2/3) ... [2021-10-28 09:45:12,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a65caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:45:12, skipping insertion in model container [2021-10-28 09:45:12,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:45:12" (3/3) ... [2021-10-28 09:45:12,937 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2021-10-28 09:45:12,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:45:12,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 09:45:12,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:45:12,992 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 09:45:12,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 09:45:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:45:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 09:45:13,013 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:13,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:13,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -907800099, now seen corresponding path program 1 times [2021-10-28 09:45:13,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:13,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9207316] [2021-10-28 09:45:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:13,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:13,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:13,226 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 09:45:13,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:13,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9207316] [2021-10-28 09:45:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9207316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:13,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:13,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:45:13,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807479845] [2021-10-28 09:45:13,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:45:13,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:45:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:45:13,252 INFO L87 Difference]: Start difference. First operand has 31 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 09:45:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:13,285 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2021-10-28 09:45:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:45:13,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 09:45:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:13,296 INFO L225 Difference]: With dead ends: 30 [2021-10-28 09:45:13,296 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 09:45:13,297 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 09:45:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 09:45:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-28 09:45:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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 09:45:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 39 transitions. [2021-10-28 09:45:13,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 39 transitions. Word has length 9 [2021-10-28 09:45:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 39 transitions. [2021-10-28 09:45:13,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 09:45:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 39 transitions. [2021-10-28 09:45:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:45:13,333 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:13,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:13,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:45:13,334 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1338121182, now seen corresponding path program 1 times [2021-10-28 09:45:13,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:13,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158935786] [2021-10-28 09:45:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:13,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:13,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:13,517 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 09:45:13,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:13,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158935786] [2021-10-28 09:45:13,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158935786] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:13,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:13,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:13,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021103804] [2021-10-28 09:45:13,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:13,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:13,522 INFO L87 Difference]: Start difference. First operand 25 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 09:45:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:13,691 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2021-10-28 09:45:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 16 [2021-10-28 09:45:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:13,694 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:45:13,696 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 09:45:13,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:13,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 09:45:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-10-28 09:45:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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 09:45:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2021-10-28 09:45:13,707 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 16 [2021-10-28 09:45:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:13,708 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2021-10-28 09:45:13,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 09:45:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2021-10-28 09:45:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:45:13,710 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:13,710 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:13,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:45:13,713 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2147467808, now seen corresponding path program 1 times [2021-10-28 09:45:13,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:13,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662903469] [2021-10-28 09:45:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:13,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:13,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:13,806 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 09:45:13,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:13,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662903469] [2021-10-28 09:45:13,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662903469] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:13,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:13,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:13,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935530202] [2021-10-28 09:45:13,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:13,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:13,810 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 09:45:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:13,929 INFO L93 Difference]: Finished difference Result 43 states and 67 transitions. [2021-10-28 09:45:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 16 [2021-10-28 09:45:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:13,932 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:45:13,933 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 09:45:13,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 09:45:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-10-28 09:45:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 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 09:45:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2021-10-28 09:45:13,944 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 16 [2021-10-28 09:45:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2021-10-28 09:45:13,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 09:45:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2021-10-28 09:45:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:45:13,948 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:13,948 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:13,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:45:13,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:13,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1468131321, now seen corresponding path program 1 times [2021-10-28 09:45:13,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:13,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767568823] [2021-10-28 09:45:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:13,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,081 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 09:45:14,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:14,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767568823] [2021-10-28 09:45:14,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767568823] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:14,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:14,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:14,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870557336] [2021-10-28 09:45:14,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:14,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:14,087 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:45:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:14,205 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2021-10-28 09:45:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 17 [2021-10-28 09:45:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:14,207 INFO L225 Difference]: With dead ends: 46 [2021-10-28 09:45:14,207 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 09:45:14,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 09:45:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-10-28 09:45:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 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 09:45:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 68 transitions. [2021-10-28 09:45:14,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 68 transitions. Word has length 17 [2021-10-28 09:45:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:14,230 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 68 transitions. [2021-10-28 09:45:14,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:45:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 68 transitions. [2021-10-28 09:45:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:45:14,232 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:14,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:14,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:45:14,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2146777605, now seen corresponding path program 1 times [2021-10-28 09:45:14,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:14,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121443908] [2021-10-28 09:45:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:14,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,290 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 09:45:14,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:14,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121443908] [2021-10-28 09:45:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121443908] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:14,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:14,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:14,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011905006] [2021-10-28 09:45:14,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:14,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:14,293 INFO L87 Difference]: Start difference. First operand 44 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:45:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:14,372 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2021-10-28 09:45:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 17 [2021-10-28 09:45:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:14,374 INFO L225 Difference]: With dead ends: 77 [2021-10-28 09:45:14,374 INFO L226 Difference]: Without dead ends: 77 [2021-10-28 09:45:14,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:14,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-28 09:45:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-10-28 09:45:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 71 states have internal predecessors, (114), 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 09:45:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 117 transitions. [2021-10-28 09:45:14,384 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 117 transitions. Word has length 17 [2021-10-28 09:45:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:14,384 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 117 transitions. [2021-10-28 09:45:14,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:45:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 117 transitions. [2021-10-28 09:45:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:45:14,386 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:14,386 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:14,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:45:14,387 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:14,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1337430979, now seen corresponding path program 1 times [2021-10-28 09:45:14,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:14,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636433794] [2021-10-28 09:45:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:14,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,443 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 09:45:14,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:14,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636433794] [2021-10-28 09:45:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636433794] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:14,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:14,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:14,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832040416] [2021-10-28 09:45:14,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:14,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:14,447 INFO L87 Difference]: Start difference. First operand 75 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:45:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:14,555 INFO L93 Difference]: Finished difference Result 93 states and 144 transitions. [2021-10-28 09:45:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 17 [2021-10-28 09:45:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:14,562 INFO L225 Difference]: With dead ends: 93 [2021-10-28 09:45:14,562 INFO L226 Difference]: Without dead ends: 93 [2021-10-28 09:45:14,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-28 09:45:14,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2021-10-28 09:45:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.5774647887323943) internal successors, (112), 71 states have internal predecessors, (112), 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 09:45:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2021-10-28 09:45:14,581 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 17 [2021-10-28 09:45:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:14,583 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2021-10-28 09:45:14,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:45:14,583 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2021-10-28 09:45:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:45:14,587 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:14,587 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 09:45:14,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:45:14,588 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:14,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:14,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2125380971, now seen corresponding path program 1 times [2021-10-28 09:45:14,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:14,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515776140] [2021-10-28 09:45:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:14,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,688 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 09:45:14,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:14,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515776140] [2021-10-28 09:45:14,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515776140] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:14,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:14,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:14,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864994927] [2021-10-28 09:45:14,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:14,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:14,693 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 09:45:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:14,804 INFO L93 Difference]: Finished difference Result 129 states and 198 transitions. [2021-10-28 09:45:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2021-10-28 09:45:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:14,808 INFO L225 Difference]: With dead ends: 129 [2021-10-28 09:45:14,812 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 09:45:14,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 09:45:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-10-28 09:45:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.5555555555555556) internal successors, (154), 99 states have internal predecessors, (154), 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 09:45:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 157 transitions. [2021-10-28 09:45:14,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 157 transitions. Word has length 18 [2021-10-28 09:45:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 157 transitions. [2021-10-28 09:45:14,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 09:45:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 157 transitions. [2021-10-28 09:45:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:45:14,834 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:14,834 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 09:45:14,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:45:14,835 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1360239699, now seen corresponding path program 1 times [2021-10-28 09:45:14,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:14,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975650498] [2021-10-28 09:45:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:14,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,934 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 09:45:14,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:14,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975650498] [2021-10-28 09:45:14,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975650498] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:14,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:14,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:14,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356794706] [2021-10-28 09:45:14,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:14,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:14,942 INFO L87 Difference]: Start difference. First operand 103 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 09:45:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:15,031 INFO L93 Difference]: Finished difference Result 137 states and 200 transitions. [2021-10-28 09:45:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2021-10-28 09:45:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:15,034 INFO L225 Difference]: With dead ends: 137 [2021-10-28 09:45:15,034 INFO L226 Difference]: Without dead ends: 137 [2021-10-28 09:45:15,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-28 09:45:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-10-28 09:45:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.4961832061068703) internal successors, (196), 131 states have internal predecessors, (196), 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 09:45:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 199 transitions. [2021-10-28 09:45:15,066 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 199 transitions. Word has length 18 [2021-10-28 09:45:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:15,068 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 199 transitions. [2021-10-28 09:45:15,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 09:45:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 199 transitions. [2021-10-28 09:45:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:45:15,072 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:15,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:15,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:45:15,073 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:15,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1462084976, now seen corresponding path program 1 times [2021-10-28 09:45:15,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:15,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181572378] [2021-10-28 09:45:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:15,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,154 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 09:45:15,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181572378] [2021-10-28 09:45:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181572378] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:15,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:15,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:15,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705628049] [2021-10-28 09:45:15,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:15,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:15,164 INFO L87 Difference]: Start difference. First operand 135 states and 199 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 09:45:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:15,243 INFO L93 Difference]: Finished difference Result 143 states and 204 transitions. [2021-10-28 09:45:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2021-10-28 09:45:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:15,251 INFO L225 Difference]: With dead ends: 143 [2021-10-28 09:45:15,251 INFO L226 Difference]: Without dead ends: 143 [2021-10-28 09:45:15,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-28 09:45:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-10-28 09:45:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.4598540145985401) internal successors, (200), 137 states have internal predecessors, (200), 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 09:45:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 203 transitions. [2021-10-28 09:45:15,277 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 203 transitions. Word has length 19 [2021-10-28 09:45:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:15,278 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 203 transitions. [2021-10-28 09:45:15,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 09:45:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 203 transitions. [2021-10-28 09:45:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:45:15,279 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:15,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:15,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:45:15,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -782026606, now seen corresponding path program 1 times [2021-10-28 09:45:15,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:15,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592032540] [2021-10-28 09:45:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:15,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,358 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 09:45:15,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:15,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592032540] [2021-10-28 09:45:15,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592032540] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:15,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:15,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:15,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306511077] [2021-10-28 09:45:15,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:15,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:15,360 INFO L87 Difference]: Start difference. First operand 141 states and 203 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 09:45:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:15,435 INFO L93 Difference]: Finished difference Result 235 states and 332 transitions. [2021-10-28 09:45:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:15,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2021-10-28 09:45:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:15,438 INFO L225 Difference]: With dead ends: 235 [2021-10-28 09:45:15,438 INFO L226 Difference]: Without dead ends: 235 [2021-10-28 09:45:15,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-28 09:45:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2021-10-28 09:45:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.4213197969543148) internal successors, (280), 197 states have internal predecessors, (280), 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 09:45:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 283 transitions. [2021-10-28 09:45:15,463 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 283 transitions. Word has length 19 [2021-10-28 09:45:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:15,463 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 283 transitions. [2021-10-28 09:45:15,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 09:45:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 283 transitions. [2021-10-28 09:45:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:45:15,465 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:15,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:15,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:45:15,465 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1591373232, now seen corresponding path program 1 times [2021-10-28 09:45:15,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:15,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078594990] [2021-10-28 09:45:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:15,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,508 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 09:45:15,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:15,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078594990] [2021-10-28 09:45:15,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078594990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:15,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:15,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:15,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109866468] [2021-10-28 09:45:15,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:15,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:15,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:15,510 INFO L87 Difference]: Start difference. First operand 201 states and 283 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 09:45:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:15,589 INFO L93 Difference]: Finished difference Result 259 states and 344 transitions. [2021-10-28 09:45:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2021-10-28 09:45:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:15,592 INFO L225 Difference]: With dead ends: 259 [2021-10-28 09:45:15,592 INFO L226 Difference]: Without dead ends: 259 [2021-10-28 09:45:15,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-28 09:45:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-10-28 09:45:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.3438735177865613) internal successors, (340), 253 states have internal predecessors, (340), 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 09:45:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 343 transitions. [2021-10-28 09:45:15,601 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 343 transitions. Word has length 19 [2021-10-28 09:45:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:15,602 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 343 transitions. [2021-10-28 09:45:15,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 09:45:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 343 transitions. [2021-10-28 09:45:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:45:15,603 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:15,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:15,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:45:15,604 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1527195016, now seen corresponding path program 1 times [2021-10-28 09:45:15,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:15,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991657214] [2021-10-28 09:45:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:15,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,649 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 09:45:15,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:15,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991657214] [2021-10-28 09:45:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991657214] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:15,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:15,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:15,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106251459] [2021-10-28 09:45:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:15,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:15,652 INFO L87 Difference]: Start difference. First operand 257 states and 343 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 09:45:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:15,738 INFO L93 Difference]: Finished difference Result 267 states and 344 transitions. [2021-10-28 09:45:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2021-10-28 09:45:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:15,741 INFO L225 Difference]: With dead ends: 267 [2021-10-28 09:45:15,741 INFO L226 Difference]: Without dead ends: 267 [2021-10-28 09:45:15,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-28 09:45:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-10-28 09:45:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 261 states have internal predecessors, (340), 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 09:45:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 343 transitions. [2021-10-28 09:45:15,750 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 343 transitions. Word has length 20 [2021-10-28 09:45:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:15,750 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 343 transitions. [2021-10-28 09:45:15,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 09:45:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 343 transitions. [2021-10-28 09:45:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:45:15,752 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:15,752 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:15,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 09:45:15,753 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:15,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2087713910, now seen corresponding path program 1 times [2021-10-28 09:45:15,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:15,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586873264] [2021-10-28 09:45:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:15,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,798 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 09:45:15,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:15,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586873264] [2021-10-28 09:45:15,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586873264] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:15,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:15,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:15,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795410907] [2021-10-28 09:45:15,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:15,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:15,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:15,801 INFO L87 Difference]: Start difference. First operand 265 states and 343 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 09:45:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:15,871 INFO L93 Difference]: Finished difference Result 425 states and 527 transitions. [2021-10-28 09:45:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:15,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2021-10-28 09:45:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:15,875 INFO L225 Difference]: With dead ends: 425 [2021-10-28 09:45:15,875 INFO L226 Difference]: Without dead ends: 425 [2021-10-28 09:45:15,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-10-28 09:45:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 393. [2021-10-28 09:45:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.2647814910025708) internal successors, (492), 389 states have internal predecessors, (492), 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 09:45:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 495 transitions. [2021-10-28 09:45:15,889 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 495 transitions. Word has length 20 [2021-10-28 09:45:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:15,889 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 495 transitions. [2021-10-28 09:45:15,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 09:45:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 495 transitions. [2021-10-28 09:45:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:45:15,891 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:15,891 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:15,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:45:15,892 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 09:45:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1397906760, now seen corresponding path program 1 times [2021-10-28 09:45:15,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:15,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356542597] [2021-10-28 09:45:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:15,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,952 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 09:45:15,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:15,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356542597] [2021-10-28 09:45:15,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356542597] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:45:15,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:45:15,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:45:15,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221228934] [2021-10-28 09:45:15,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:45:15,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:45:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:45:15,956 INFO L87 Difference]: Start difference. First operand 393 states and 495 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 09:45:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:16,042 INFO L93 Difference]: Finished difference Result 487 states and 566 transitions. [2021-10-28 09:45:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:45:16,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2021-10-28 09:45:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:16,043 INFO L225 Difference]: With dead ends: 487 [2021-10-28 09:45:16,044 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:45:16,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:45:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:45:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:45:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:45:16,046 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-10-28 09:45:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:16,046 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:45:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 09:45:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:45:16,047 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:45:16,050 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:45:16,050 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:45:16,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:45:16,054 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:16,055 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:45:16,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:45:16 BoogieIcfgContainer [2021-10-28 09:45:16,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:45:16,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:45:16,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:45:16,060 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:45:16,060 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:45:12" (3/4) ... [2021-10-28 09:45:16,063 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:45:16,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 09:45:16,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:45:16,071 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:45:16,079 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-28 09:45:16,079 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:45:16,079 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 09:45:16,080 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:45:16,135 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:45:16,136 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:45:16,137 INFO L168 Benchmark]: Toolchain (without parser) took 4020.68 ms. Allocated memory was 90.2 MB in the beginning and 140.5 MB in the end (delta: 50.3 MB). Free memory was 47.9 MB in the beginning and 101.8 MB in the end (delta: -53.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:45:16,138 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:45:16,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.50 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 47.8 MB in the beginning and 87.5 MB in the end (delta: -39.8 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:45:16,139 INFO L168 Benchmark]: Boogie Preprocessor took 34.21 ms. Allocated memory is still 115.3 MB. Free memory was 87.5 MB in the beginning and 86.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:45:16,140 INFO L168 Benchmark]: RCFGBuilder took 460.46 ms. Allocated memory is still 115.3 MB. Free memory was 86.2 MB in the beginning and 88.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:45:16,140 INFO L168 Benchmark]: TraceAbstraction took 3127.88 ms. Allocated memory was 115.3 MB in the beginning and 140.5 MB in the end (delta: 25.2 MB). Free memory was 87.9 MB in the beginning and 105.0 MB in the end (delta: -17.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:45:16,140 INFO L168 Benchmark]: Witness Printer took 76.32 ms. Allocated memory is still 140.5 MB. Free memory was 105.0 MB in the beginning and 101.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:45:16,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 311.50 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 47.8 MB in the beginning and 87.5 MB in the end (delta: -39.8 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.21 ms. Allocated memory is still 115.3 MB. Free memory was 87.5 MB in the beginning and 86.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 460.46 ms. Allocated memory is still 115.3 MB. Free memory was 86.2 MB in the beginning and 88.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3127.88 ms. Allocated memory was 115.3 MB in the beginning and 140.5 MB in the end (delta: 25.2 MB). Free memory was 87.9 MB in the beginning and 105.0 MB in the end (delta: -17.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 76.32 ms. Allocated memory is still 140.5 MB. Free memory was 105.0 MB in the beginning and 101.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 93]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 649 SDtfs, 862 SDslu, 81 SDs, 0 SdLazy, 451 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=393occurred in iteration=13, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 136 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 806 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:45:16,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d96cf-385d-413c-b828-cf1e34a4d7b4/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...