./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c861265e1e1e27fe23877e47c41012b82996e1c7e91f362716a115cbf38b786b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:26:44,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:26:44,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:26:44,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:26:44,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:26:44,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:26:44,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:26:44,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:26:44,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:26:44,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:26:44,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:26:44,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:26:44,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:26:44,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:26:44,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:26:44,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:26:44,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:26:44,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:26:44,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:26:44,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:26:44,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:26:44,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:26:44,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:26:44,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:26:44,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:26:44,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:26:44,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:26:44,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:26:44,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:26:44,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:26:44,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:26:44,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:26:44,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:26:44,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:26:44,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:26:44,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:26:44,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:26:44,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:26:44,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:26:44,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:26:44,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:26:44,969 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:26:44,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:26:45,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:26:45,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:26:45,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:26:45,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:26:45,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:26:45,001 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:26:45,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:26:45,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:26:45,002 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:26:45,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:26:45,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:26:45,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:26:45,002 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:26:45,002 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:26:45,003 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:26:45,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:26:45,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:26:45,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:26:45,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:26:45,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:26:45,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:26:45,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:26:45,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:26:45,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:26:45,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:26:45,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:26:45,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:26:45,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:26:45,006 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_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c861265e1e1e27fe23877e47c41012b82996e1c7e91f362716a115cbf38b786b [2021-10-21 19:26:45,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:26:45,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:26:45,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:26:45,280 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:26:45,287 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:26:45,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/locks/test_locks_10.c [2021-10-21 19:26:45,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/data/173565d08/915d9098461440348e2a920b9ef63135/FLAG9bc6fd7f0 [2021-10-21 19:26:45,821 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:26:45,822 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/sv-benchmarks/c/locks/test_locks_10.c [2021-10-21 19:26:45,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/data/173565d08/915d9098461440348e2a920b9ef63135/FLAG9bc6fd7f0 [2021-10-21 19:26:46,199 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/data/173565d08/915d9098461440348e2a920b9ef63135 [2021-10-21 19:26:46,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:26:46,203 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:26:46,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:26:46,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:26:46,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:26:46,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dbf775c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46, skipping insertion in model container [2021-10-21 19:26:46,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:26:46,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:26:46,372 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_549cb324-1340-42f1-93c9-872408d409af/sv-benchmarks/c/locks/test_locks_10.c[3901,3914] [2021-10-21 19:26:46,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:26:46,420 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:26:46,444 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_549cb324-1340-42f1-93c9-872408d409af/sv-benchmarks/c/locks/test_locks_10.c[3901,3914] [2021-10-21 19:26:46,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:26:46,458 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:26:46,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46 WrapperNode [2021-10-21 19:26:46,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:26:46,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:26:46,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:26:46,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:26:46,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:26:46,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:26:46,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:26:46,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:26:46,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (1/1) ... [2021-10-21 19:26:46,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:26:46,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:46,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:26:46,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:26:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:26:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:26:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:26:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:26:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:26:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:26:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:26:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:26:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:26:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:26:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:26:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:26:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:26:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:26:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:26:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:26:46,913 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:26:46,913 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-21 19:26:46,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:26:46 BoogieIcfgContainer [2021-10-21 19:26:46,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:26:46,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:26:46,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:26:46,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:26:46,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:26:46" (1/3) ... [2021-10-21 19:26:46,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32641348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:26:46, skipping insertion in model container [2021-10-21 19:26:46,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:46" (2/3) ... [2021-10-21 19:26:46,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32641348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:26:46, skipping insertion in model container [2021-10-21 19:26:46,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:26:46" (3/3) ... [2021-10-21 19:26:46,937 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2021-10-21 19:26:46,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:26:46,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 19:26:46,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:26:46,998 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:26:46,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 19:26:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 41 states have internal predecessors, (74), 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) [2021-10-21 19:26:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:26:47,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:47,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:47,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1705512569, now seen corresponding path program 1 times [2021-10-21 19:26:47,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:47,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440487500] [2021-10-21 19:26:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:47,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:47,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:47,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440487500] [2021-10-21 19:26:47,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440487500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:47,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:47,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:26:47,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790958127] [2021-10-21 19:26:47,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:26:47,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:26:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:26:47,310 INFO L87 Difference]: Start difference. First operand has 46 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 41 states have internal predecessors, (74), 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) [2021-10-21 19:26:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:47,350 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2021-10-21 19:26:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:26:47,352 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 [2021-10-21 19:26:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:47,361 INFO L225 Difference]: With dead ends: 45 [2021-10-21 19:26:47,361 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:26:47,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:26:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:26:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-21 19:26:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 69 transitions. [2021-10-21 19:26:47,414 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 69 transitions. Word has length 9 [2021-10-21 19:26:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:47,414 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 69 transitions. [2021-10-21 19:26:47,415 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) [2021-10-21 19:26:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 69 transitions. [2021-10-21 19:26:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:26:47,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:47,416 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:47,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:26:47,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash -897937924, now seen corresponding path program 1 times [2021-10-21 19:26:47,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:47,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983097960] [2021-10-21 19:26:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:47,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:47,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:47,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983097960] [2021-10-21 19:26:47,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983097960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:47,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:47,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:47,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725270167] [2021-10-21 19:26:47,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:47,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:47,546 INFO L87 Difference]: Start difference. First operand 40 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:47,765 INFO L93 Difference]: Finished difference Result 73 states and 129 transitions. [2021-10-21 19:26:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-10-21 19:26:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:47,770 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:26:47,771 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 19:26:47,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 19:26:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-10-21 19:26:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2021-10-21 19:26:47,791 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2021-10-21 19:26:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:47,792 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2021-10-21 19:26:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2021-10-21 19:26:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:26:47,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:47,794 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:47,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:26:47,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1484743938, now seen corresponding path program 1 times [2021-10-21 19:26:47,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:47,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958436634] [2021-10-21 19:26:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:47,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:47,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:47,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958436634] [2021-10-21 19:26:47,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958436634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:47,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:47,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:47,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527856290] [2021-10-21 19:26:47,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:47,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:47,960 INFO L87 Difference]: Start difference. First operand 51 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:48,123 INFO L93 Difference]: Finished difference Result 73 states and 127 transitions. [2021-10-21 19:26:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-10-21 19:26:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:48,126 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:26:48,126 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 19:26:48,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 19:26:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-10-21 19:26:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.835820895522388) internal successors, (123), 67 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2021-10-21 19:26:48,135 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2021-10-21 19:26:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:48,135 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2021-10-21 19:26:48,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2021-10-21 19:26:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:26:48,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:48,137 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:48,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:26:48,138 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2066058485, now seen corresponding path program 1 times [2021-10-21 19:26:48,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:48,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653159856] [2021-10-21 19:26:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:48,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:48,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:48,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653159856] [2021-10-21 19:26:48,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653159856] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:48,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:48,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:48,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393035446] [2021-10-21 19:26:48,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:48,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:48,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:48,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:48,216 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:48,349 INFO L93 Difference]: Finished difference Result 76 states and 129 transitions. [2021-10-21 19:26:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2021-10-21 19:26:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:48,354 INFO L225 Difference]: With dead ends: 76 [2021-10-21 19:26:48,354 INFO L226 Difference]: Without dead ends: 76 [2021-10-21 19:26:48,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-21 19:26:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-10-21 19:26:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 70 states have internal predecessors, (125), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2021-10-21 19:26:48,372 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2021-10-21 19:26:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:48,372 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2021-10-21 19:26:48,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2021-10-21 19:26:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:26:48,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:48,374 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:48,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:26:48,374 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:48,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1217791561, now seen corresponding path program 1 times [2021-10-21 19:26:48,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:48,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705488738] [2021-10-21 19:26:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:48,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:48,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:48,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705488738] [2021-10-21 19:26:48,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705488738] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:48,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:48,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:48,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130027373] [2021-10-21 19:26:48,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:48,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:48,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:48,495 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:48,634 INFO L93 Difference]: Finished difference Result 137 states and 238 transitions. [2021-10-21 19:26:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:48,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2021-10-21 19:26:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:48,637 INFO L225 Difference]: With dead ends: 137 [2021-10-21 19:26:48,637 INFO L226 Difference]: Without dead ends: 137 [2021-10-21 19:26:48,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-21 19:26:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-10-21 19:26:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.786259541984733) internal successors, (234), 131 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 237 transitions. [2021-10-21 19:26:48,665 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 237 transitions. Word has length 22 [2021-10-21 19:26:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:48,665 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 237 transitions. [2021-10-21 19:26:48,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 237 transitions. [2021-10-21 19:26:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:26:48,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:48,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:48,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:26:48,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1804597575, now seen corresponding path program 1 times [2021-10-21 19:26:48,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:48,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790255119] [2021-10-21 19:26:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:48,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:48,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:48,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790255119] [2021-10-21 19:26:48,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790255119] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:48,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:48,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:48,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705414756] [2021-10-21 19:26:48,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:48,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:48,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:48,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:48,729 INFO L87 Difference]: Start difference. First operand 135 states and 237 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:48,851 INFO L93 Difference]: Finished difference Result 173 states and 304 transitions. [2021-10-21 19:26:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:48,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2021-10-21 19:26:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:48,853 INFO L225 Difference]: With dead ends: 173 [2021-10-21 19:26:48,853 INFO L226 Difference]: Without dead ends: 173 [2021-10-21 19:26:48,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-21 19:26:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 135. [2021-10-21 19:26:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.7709923664122138) internal successors, (232), 131 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2021-10-21 19:26:48,862 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2021-10-21 19:26:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:48,862 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2021-10-21 19:26:48,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2021-10-21 19:26:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:26:48,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:48,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:48,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:26:48,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -902953549, now seen corresponding path program 1 times [2021-10-21 19:26:48,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:48,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532145938] [2021-10-21 19:26:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:48,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:48,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:48,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532145938] [2021-10-21 19:26:48,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532145938] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:48,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541895325] [2021-10-21 19:26:48,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:48,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:48,945 INFO L87 Difference]: Start difference. First operand 135 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:49,078 INFO L93 Difference]: Finished difference Result 249 states and 438 transitions. [2021-10-21 19:26:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:49,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2021-10-21 19:26:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:49,081 INFO L225 Difference]: With dead ends: 249 [2021-10-21 19:26:49,081 INFO L226 Difference]: Without dead ends: 249 [2021-10-21 19:26:49,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-10-21 19:26:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-10-21 19:26:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.7541899441340782) internal successors, (314), 179 states have internal predecessors, (314), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 317 transitions. [2021-10-21 19:26:49,097 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 317 transitions. Word has length 23 [2021-10-21 19:26:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:49,099 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 317 transitions. [2021-10-21 19:26:49,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 317 transitions. [2021-10-21 19:26:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:26:49,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:49,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:49,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:26:49,110 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1489759563, now seen corresponding path program 1 times [2021-10-21 19:26:49,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:49,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668056447] [2021-10-21 19:26:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:49,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:49,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:49,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668056447] [2021-10-21 19:26:49,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668056447] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:49,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:49,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:49,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600328740] [2021-10-21 19:26:49,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:49,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:49,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:49,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:49,196 INFO L87 Difference]: Start difference. First operand 183 states and 317 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:49,316 INFO L93 Difference]: Finished difference Result 257 states and 440 transitions. [2021-10-21 19:26:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:49,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2021-10-21 19:26:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:49,320 INFO L225 Difference]: With dead ends: 257 [2021-10-21 19:26:49,320 INFO L226 Difference]: Without dead ends: 257 [2021-10-21 19:26:49,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-21 19:26:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2021-10-21 19:26:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.7370517928286853) internal successors, (436), 251 states have internal predecessors, (436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 439 transitions. [2021-10-21 19:26:49,329 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 439 transitions. Word has length 23 [2021-10-21 19:26:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:49,330 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 439 transitions. [2021-10-21 19:26:49,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 439 transitions. [2021-10-21 19:26:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:26:49,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:49,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:49,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:26:49,333 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2073425118, now seen corresponding path program 1 times [2021-10-21 19:26:49,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:49,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106096480] [2021-10-21 19:26:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:49,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:49,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:49,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106096480] [2021-10-21 19:26:49,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106096480] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:49,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:49,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:49,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099620035] [2021-10-21 19:26:49,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:49,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:49,389 INFO L87 Difference]: Start difference. First operand 255 states and 439 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:49,501 INFO L93 Difference]: Finished difference Result 263 states and 444 transitions. [2021-10-21 19:26:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2021-10-21 19:26:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:49,503 INFO L225 Difference]: With dead ends: 263 [2021-10-21 19:26:49,503 INFO L226 Difference]: Without dead ends: 263 [2021-10-21 19:26:49,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-10-21 19:26:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2021-10-21 19:26:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.7120622568093384) internal successors, (440), 257 states have internal predecessors, (440), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 443 transitions. [2021-10-21 19:26:49,527 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 443 transitions. Word has length 24 [2021-10-21 19:26:49,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:49,527 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 443 transitions. [2021-10-21 19:26:49,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 443 transitions. [2021-10-21 19:26:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:26:49,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:49,529 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:49,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:26:49,529 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:49,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1062307868, now seen corresponding path program 1 times [2021-10-21 19:26:49,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:49,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020127113] [2021-10-21 19:26:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:49,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:49,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:49,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020127113] [2021-10-21 19:26:49,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020127113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:49,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:49,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:49,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910472782] [2021-10-21 19:26:49,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:49,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:49,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:49,574 INFO L87 Difference]: Start difference. First operand 261 states and 443 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:49,684 INFO L93 Difference]: Finished difference Result 475 states and 812 transitions. [2021-10-21 19:26:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2021-10-21 19:26:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:49,688 INFO L225 Difference]: With dead ends: 475 [2021-10-21 19:26:49,688 INFO L226 Difference]: Without dead ends: 475 [2021-10-21 19:26:49,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-10-21 19:26:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2021-10-21 19:26:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.680672268907563) internal successors, (600), 357 states have internal predecessors, (600), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 603 transitions. [2021-10-21 19:26:49,699 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 603 transitions. Word has length 24 [2021-10-21 19:26:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:49,699 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 603 transitions. [2021-10-21 19:26:49,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 603 transitions. [2021-10-21 19:26:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:26:49,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:49,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:49,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:26:49,701 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 475501854, now seen corresponding path program 1 times [2021-10-21 19:26:49,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:49,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095771044] [2021-10-21 19:26:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:49,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:49,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:49,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095771044] [2021-10-21 19:26:49,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095771044] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:49,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:49,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:49,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789156193] [2021-10-21 19:26:49,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:49,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:49,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:49,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:49,750 INFO L87 Difference]: Start difference. First operand 361 states and 603 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:49,856 INFO L93 Difference]: Finished difference Result 499 states and 824 transitions. [2021-10-21 19:26:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2021-10-21 19:26:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:49,860 INFO L225 Difference]: With dead ends: 499 [2021-10-21 19:26:49,860 INFO L226 Difference]: Without dead ends: 499 [2021-10-21 19:26:49,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-10-21 19:26:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2021-10-21 19:26:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 493 states have (on average 1.6632860040567952) internal successors, (820), 493 states have internal predecessors, (820), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 823 transitions. [2021-10-21 19:26:49,873 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 823 transitions. Word has length 24 [2021-10-21 19:26:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 823 transitions. [2021-10-21 19:26:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 823 transitions. [2021-10-21 19:26:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:26:49,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:49,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:26:49,875 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:49,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1427980054, now seen corresponding path program 1 times [2021-10-21 19:26:49,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:49,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394422930] [2021-10-21 19:26:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:49,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:49,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:49,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394422930] [2021-10-21 19:26:49,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394422930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:49,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:49,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:49,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448361992] [2021-10-21 19:26:49,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:49,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:49,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:49,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:49,922 INFO L87 Difference]: Start difference. First operand 497 states and 823 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:50,031 INFO L93 Difference]: Finished difference Result 507 states and 824 transitions. [2021-10-21 19:26:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:50,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2021-10-21 19:26:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:50,035 INFO L225 Difference]: With dead ends: 507 [2021-10-21 19:26:50,035 INFO L226 Difference]: Without dead ends: 507 [2021-10-21 19:26:50,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-10-21 19:26:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2021-10-21 19:26:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.6367265469061876) internal successors, (820), 501 states have internal predecessors, (820), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 823 transitions. [2021-10-21 19:26:50,049 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 823 transitions. Word has length 25 [2021-10-21 19:26:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:50,049 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 823 transitions. [2021-10-21 19:26:50,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 823 transitions. [2021-10-21 19:26:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:26:50,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:50,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:50,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:26:50,051 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1855869992, now seen corresponding path program 1 times [2021-10-21 19:26:50,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:50,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34924784] [2021-10-21 19:26:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:50,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:50,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:50,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34924784] [2021-10-21 19:26:50,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34924784] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:50,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:50,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:50,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149726930] [2021-10-21 19:26:50,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:50,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:50,116 INFO L87 Difference]: Start difference. First operand 505 states and 823 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:50,220 INFO L93 Difference]: Finished difference Result 907 states and 1488 transitions. [2021-10-21 19:26:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:50,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2021-10-21 19:26:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:50,226 INFO L225 Difference]: With dead ends: 907 [2021-10-21 19:26:50,226 INFO L226 Difference]: Without dead ends: 907 [2021-10-21 19:26:50,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-10-21 19:26:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2021-10-21 19:26:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 709 states have (on average 1.5966149506346967) internal successors, (1132), 709 states have internal predecessors, (1132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1135 transitions. [2021-10-21 19:26:50,247 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1135 transitions. Word has length 25 [2021-10-21 19:26:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:50,247 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1135 transitions. [2021-10-21 19:26:50,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1135 transitions. [2021-10-21 19:26:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:26:50,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:50,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:50,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:26:50,249 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1269063978, now seen corresponding path program 1 times [2021-10-21 19:26:50,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:50,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710653613] [2021-10-21 19:26:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:50,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:50,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:50,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710653613] [2021-10-21 19:26:50,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710653613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:50,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:50,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:50,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584392242] [2021-10-21 19:26:50,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:50,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:50,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:50,297 INFO L87 Difference]: Start difference. First operand 713 states and 1135 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:50,403 INFO L93 Difference]: Finished difference Result 971 states and 1528 transitions. [2021-10-21 19:26:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:50,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2021-10-21 19:26:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:50,409 INFO L225 Difference]: With dead ends: 971 [2021-10-21 19:26:50,409 INFO L226 Difference]: Without dead ends: 971 [2021-10-21 19:26:50,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-10-21 19:26:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2021-10-21 19:26:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.5792746113989637) internal successors, (1524), 965 states have internal predecessors, (1524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1527 transitions. [2021-10-21 19:26:50,435 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1527 transitions. Word has length 25 [2021-10-21 19:26:50,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:50,436 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1527 transitions. [2021-10-21 19:26:50,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1527 transitions. [2021-10-21 19:26:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:26:50,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:50,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:50,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:26:50,438 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1697609651, now seen corresponding path program 1 times [2021-10-21 19:26:50,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:50,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751771094] [2021-10-21 19:26:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:50,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:50,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:50,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751771094] [2021-10-21 19:26:50,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751771094] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:50,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:50,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:50,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635144195] [2021-10-21 19:26:50,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:50,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:50,481 INFO L87 Difference]: Start difference. First operand 969 states and 1527 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:50,582 INFO L93 Difference]: Finished difference Result 987 states and 1528 transitions. [2021-10-21 19:26:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2021-10-21 19:26:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:50,588 INFO L225 Difference]: With dead ends: 987 [2021-10-21 19:26:50,588 INFO L226 Difference]: Without dead ends: 987 [2021-10-21 19:26:50,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-10-21 19:26:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2021-10-21 19:26:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 981 states have (on average 1.5535168195718654) internal successors, (1524), 981 states have internal predecessors, (1524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1527 transitions. [2021-10-21 19:26:50,633 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1527 transitions. Word has length 26 [2021-10-21 19:26:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:50,633 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1527 transitions. [2021-10-21 19:26:50,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1527 transitions. [2021-10-21 19:26:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:26:50,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:50,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:26:50,636 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 686492401, now seen corresponding path program 1 times [2021-10-21 19:26:50,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:50,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145577197] [2021-10-21 19:26:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:50,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:50,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:50,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145577197] [2021-10-21 19:26:50,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145577197] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:50,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:50,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:50,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769823833] [2021-10-21 19:26:50,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:50,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:50,677 INFO L87 Difference]: Start difference. First operand 985 states and 1527 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:50,792 INFO L93 Difference]: Finished difference Result 1739 states and 2712 transitions. [2021-10-21 19:26:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:50,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2021-10-21 19:26:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:50,802 INFO L225 Difference]: With dead ends: 1739 [2021-10-21 19:26:50,802 INFO L226 Difference]: Without dead ends: 1739 [2021-10-21 19:26:50,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-10-21 19:26:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2021-10-21 19:26:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1413 states have (on average 1.5088464260438783) internal successors, (2132), 1413 states have internal predecessors, (2132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2135 transitions. [2021-10-21 19:26:50,843 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2135 transitions. Word has length 26 [2021-10-21 19:26:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:50,843 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2135 transitions. [2021-10-21 19:26:50,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2135 transitions. [2021-10-21 19:26:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:26:50,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:50,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:50,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:26:50,847 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash 99686387, now seen corresponding path program 1 times [2021-10-21 19:26:50,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:50,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045701392] [2021-10-21 19:26:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:50,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:50,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:50,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045701392] [2021-10-21 19:26:50,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045701392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:50,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:50,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:50,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310235527] [2021-10-21 19:26:50,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:50,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:50,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:50,894 INFO L87 Difference]: Start difference. First operand 1417 states and 2135 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:51,000 INFO L93 Difference]: Finished difference Result 1899 states and 2824 transitions. [2021-10-21 19:26:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:51,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2021-10-21 19:26:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:51,011 INFO L225 Difference]: With dead ends: 1899 [2021-10-21 19:26:51,011 INFO L226 Difference]: Without dead ends: 1899 [2021-10-21 19:26:51,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-10-21 19:26:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2021-10-21 19:26:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1893 states have (on average 1.4896988906497624) internal successors, (2820), 1893 states have internal predecessors, (2820), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2823 transitions. [2021-10-21 19:26:51,060 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2823 transitions. Word has length 26 [2021-10-21 19:26:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:51,060 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 2823 transitions. [2021-10-21 19:26:51,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2823 transitions. [2021-10-21 19:26:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:26:51,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:51,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:51,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:26:51,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash -193356961, now seen corresponding path program 1 times [2021-10-21 19:26:51,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:51,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163447371] [2021-10-21 19:26:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:51,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:51,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:51,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163447371] [2021-10-21 19:26:51,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163447371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:51,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:51,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:51,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712287632] [2021-10-21 19:26:51,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:51,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:51,119 INFO L87 Difference]: Start difference. First operand 1897 states and 2823 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:51,229 INFO L93 Difference]: Finished difference Result 1931 states and 2824 transitions. [2021-10-21 19:26:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2021-10-21 19:26:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:51,241 INFO L225 Difference]: With dead ends: 1931 [2021-10-21 19:26:51,241 INFO L226 Difference]: Without dead ends: 1931 [2021-10-21 19:26:51,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-10-21 19:26:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2021-10-21 19:26:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.464935064935065) internal successors, (2820), 1925 states have internal predecessors, (2820), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2823 transitions. [2021-10-21 19:26:51,299 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2823 transitions. Word has length 27 [2021-10-21 19:26:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:51,299 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 2823 transitions. [2021-10-21 19:26:51,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2823 transitions. [2021-10-21 19:26:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:26:51,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:51,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:51,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:26:51,303 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:51,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1204474211, now seen corresponding path program 1 times [2021-10-21 19:26:51,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:51,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172166392] [2021-10-21 19:26:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:51,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:51,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:51,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172166392] [2021-10-21 19:26:51,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172166392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:51,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:51,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:51,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119419827] [2021-10-21 19:26:51,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:51,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:51,351 INFO L87 Difference]: Start difference. First operand 1929 states and 2823 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:51,464 INFO L93 Difference]: Finished difference Result 3339 states and 4904 transitions. [2021-10-21 19:26:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2021-10-21 19:26:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:51,482 INFO L225 Difference]: With dead ends: 3339 [2021-10-21 19:26:51,482 INFO L226 Difference]: Without dead ends: 3339 [2021-10-21 19:26:51,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-10-21 19:26:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2021-10-21 19:26:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2821 states have (on average 1.4193548387096775) internal successors, (4004), 2821 states have internal predecessors, (4004), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4007 transitions. [2021-10-21 19:26:51,564 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4007 transitions. Word has length 27 [2021-10-21 19:26:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:51,564 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 4007 transitions. [2021-10-21 19:26:51,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4007 transitions. [2021-10-21 19:26:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:26:51,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:51,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:51,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:26:51,580 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:51,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1791280225, now seen corresponding path program 1 times [2021-10-21 19:26:51,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:51,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580114633] [2021-10-21 19:26:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:51,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:51,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:51,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580114633] [2021-10-21 19:26:51,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580114633] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:51,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:51,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:51,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754671157] [2021-10-21 19:26:51,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:51,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:51,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:51,619 INFO L87 Difference]: Start difference. First operand 2825 states and 4007 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:51,731 INFO L93 Difference]: Finished difference Result 3723 states and 5192 transitions. [2021-10-21 19:26:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:51,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2021-10-21 19:26:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:51,753 INFO L225 Difference]: With dead ends: 3723 [2021-10-21 19:26:51,754 INFO L226 Difference]: Without dead ends: 3723 [2021-10-21 19:26:51,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2021-10-21 19:26:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2021-10-21 19:26:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3717 states have (on average 1.3957492601560397) internal successors, (5188), 3717 states have internal predecessors, (5188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5191 transitions. [2021-10-21 19:26:51,850 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5191 transitions. Word has length 27 [2021-10-21 19:26:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:51,850 INFO L470 AbstractCegarLoop]: Abstraction has 3721 states and 5191 transitions. [2021-10-21 19:26:51,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5191 transitions. [2021-10-21 19:26:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:26:51,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:51,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:51,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:26:51,856 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:51,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1316220552, now seen corresponding path program 1 times [2021-10-21 19:26:51,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:51,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17121244] [2021-10-21 19:26:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:51,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:51,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:51,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17121244] [2021-10-21 19:26:51,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17121244] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:51,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:51,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:51,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159077205] [2021-10-21 19:26:51,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:51,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:51,897 INFO L87 Difference]: Start difference. First operand 3721 states and 5191 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:52,001 INFO L93 Difference]: Finished difference Result 3787 states and 5192 transitions. [2021-10-21 19:26:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2021-10-21 19:26:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:52,020 INFO L225 Difference]: With dead ends: 3787 [2021-10-21 19:26:52,020 INFO L226 Difference]: Without dead ends: 3787 [2021-10-21 19:26:52,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2021-10-21 19:26:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2021-10-21 19:26:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3781 states have (on average 1.37212377677863) internal successors, (5188), 3781 states have internal predecessors, (5188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5191 transitions. [2021-10-21 19:26:52,138 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5191 transitions. Word has length 28 [2021-10-21 19:26:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:52,138 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 5191 transitions. [2021-10-21 19:26:52,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5191 transitions. [2021-10-21 19:26:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:26:52,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:52,143 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:52,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 19:26:52,144 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash 305103302, now seen corresponding path program 1 times [2021-10-21 19:26:52,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:52,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504868531] [2021-10-21 19:26:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:52,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:52,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:52,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504868531] [2021-10-21 19:26:52,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504868531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:52,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:52,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:52,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995794256] [2021-10-21 19:26:52,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:52,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:52,185 INFO L87 Difference]: Start difference. First operand 3785 states and 5191 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:52,298 INFO L93 Difference]: Finished difference Result 6411 states and 8776 transitions. [2021-10-21 19:26:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2021-10-21 19:26:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:52,327 INFO L225 Difference]: With dead ends: 6411 [2021-10-21 19:26:52,327 INFO L226 Difference]: Without dead ends: 6411 [2021-10-21 19:26:52,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2021-10-21 19:26:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2021-10-21 19:26:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.329075749512152) internal successors, (7492), 5637 states have internal predecessors, (7492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7495 transitions. [2021-10-21 19:26:52,495 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7495 transitions. Word has length 28 [2021-10-21 19:26:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:52,496 INFO L470 AbstractCegarLoop]: Abstraction has 5641 states and 7495 transitions. [2021-10-21 19:26:52,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7495 transitions. [2021-10-21 19:26:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:26:52,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:52,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:52,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 19:26:52,505 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:52,506 INFO L82 PathProgramCache]: Analyzing trace with hash -281702712, now seen corresponding path program 1 times [2021-10-21 19:26:52,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:52,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500355444] [2021-10-21 19:26:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:52,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:52,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:52,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500355444] [2021-10-21 19:26:52,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500355444] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:52,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:52,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:52,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941713624] [2021-10-21 19:26:52,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:52,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:52,551 INFO L87 Difference]: Start difference. First operand 5641 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:52,668 INFO L93 Difference]: Finished difference Result 7307 states and 9480 transitions. [2021-10-21 19:26:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:52,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2021-10-21 19:26:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:52,682 INFO L225 Difference]: With dead ends: 7307 [2021-10-21 19:26:52,682 INFO L226 Difference]: Without dead ends: 7307 [2021-10-21 19:26:52,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2021-10-21 19:26:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2021-10-21 19:26:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7301 states have (on average 1.297904396657992) internal successors, (9476), 7301 states have internal predecessors, (9476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9479 transitions. [2021-10-21 19:26:52,882 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9479 transitions. Word has length 28 [2021-10-21 19:26:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 7305 states and 9479 transitions. [2021-10-21 19:26:52,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9479 transitions. [2021-10-21 19:26:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:26:52,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:52,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:52,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 19:26:52,894 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:52,895 INFO L82 PathProgramCache]: Analyzing trace with hash 868483540, now seen corresponding path program 1 times [2021-10-21 19:26:52,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:52,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983966391] [2021-10-21 19:26:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:52,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:52,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:52,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983966391] [2021-10-21 19:26:52,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983966391] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:52,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:52,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:52,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538794064] [2021-10-21 19:26:52,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:52,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:52,936 INFO L87 Difference]: Start difference. First operand 7305 states and 9479 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:53,059 INFO L93 Difference]: Finished difference Result 7435 states and 9480 transitions. [2021-10-21 19:26:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:53,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2021-10-21 19:26:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:53,073 INFO L225 Difference]: With dead ends: 7435 [2021-10-21 19:26:53,074 INFO L226 Difference]: Without dead ends: 7435 [2021-10-21 19:26:53,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2021-10-21 19:26:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2021-10-21 19:26:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7429 states have (on average 1.2755417956656347) internal successors, (9476), 7429 states have internal predecessors, (9476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9479 transitions. [2021-10-21 19:26:53,281 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9479 transitions. Word has length 29 [2021-10-21 19:26:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:53,281 INFO L470 AbstractCegarLoop]: Abstraction has 7433 states and 9479 transitions. [2021-10-21 19:26:53,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9479 transitions. [2021-10-21 19:26:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:26:53,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:53,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:53,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 19:26:53,292 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:53,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:53,293 INFO L82 PathProgramCache]: Analyzing trace with hash -142633710, now seen corresponding path program 1 times [2021-10-21 19:26:53,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:53,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755446842] [2021-10-21 19:26:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:53,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:53,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:53,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755446842] [2021-10-21 19:26:53,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755446842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:53,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:53,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:53,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320067774] [2021-10-21 19:26:53,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:53,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:53,343 INFO L87 Difference]: Start difference. First operand 7433 states and 9479 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:53,474 INFO L93 Difference]: Finished difference Result 12299 states and 15496 transitions. [2021-10-21 19:26:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:53,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2021-10-21 19:26:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:53,496 INFO L225 Difference]: With dead ends: 12299 [2021-10-21 19:26:53,496 INFO L226 Difference]: Without dead ends: 12299 [2021-10-21 19:26:53,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2021-10-21 19:26:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2021-10-21 19:26:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.2384417428343242) internal successors, (13956), 11269 states have internal predecessors, (13956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13959 transitions. [2021-10-21 19:26:53,757 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13959 transitions. Word has length 29 [2021-10-21 19:26:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:53,758 INFO L470 AbstractCegarLoop]: Abstraction has 11273 states and 13959 transitions. [2021-10-21 19:26:53,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13959 transitions. [2021-10-21 19:26:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:26:53,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:53,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:53,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-21 19:26:53,776 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash -729439724, now seen corresponding path program 1 times [2021-10-21 19:26:53,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:53,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771644520] [2021-10-21 19:26:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:53,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:53,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:53,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:53,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771644520] [2021-10-21 19:26:53,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771644520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:53,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:53,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:53,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366587107] [2021-10-21 19:26:53,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:53,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:53,823 INFO L87 Difference]: Start difference. First operand 11273 states and 13959 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:54,033 INFO L93 Difference]: Finished difference Result 14347 states and 17160 transitions. [2021-10-21 19:26:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:54,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2021-10-21 19:26:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:54,058 INFO L225 Difference]: With dead ends: 14347 [2021-10-21 19:26:54,059 INFO L226 Difference]: Without dead ends: 14347 [2021-10-21 19:26:54,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2021-10-21 19:26:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2021-10-21 19:26:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.1962903563210376) internal successors, (17156), 14341 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 17159 transitions. [2021-10-21 19:26:54,378 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 17159 transitions. Word has length 29 [2021-10-21 19:26:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:54,378 INFO L470 AbstractCegarLoop]: Abstraction has 14345 states and 17159 transitions. [2021-10-21 19:26:54,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 17159 transitions. [2021-10-21 19:26:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:26:54,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:54,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:54,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 19:26:54,401 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash -126461603, now seen corresponding path program 1 times [2021-10-21 19:26:54,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:54,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789382744] [2021-10-21 19:26:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:54,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:54,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:54,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:54,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789382744] [2021-10-21 19:26:54,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789382744] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:54,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:54,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:54,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827094388] [2021-10-21 19:26:54,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:54,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:54,445 INFO L87 Difference]: Start difference. First operand 14345 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:54,737 INFO L93 Difference]: Finished difference Result 14603 states and 17160 transitions. [2021-10-21 19:26:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2021-10-21 19:26:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:54,775 INFO L225 Difference]: With dead ends: 14603 [2021-10-21 19:26:54,776 INFO L226 Difference]: Without dead ends: 14603 [2021-10-21 19:26:54,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2021-10-21 19:26:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2021-10-21 19:26:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.175309995204494) internal successors, (17156), 14597 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 17159 transitions. [2021-10-21 19:26:55,101 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 17159 transitions. Word has length 30 [2021-10-21 19:26:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:55,101 INFO L470 AbstractCegarLoop]: Abstraction has 14601 states and 17159 transitions. [2021-10-21 19:26:55,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 17159 transitions. [2021-10-21 19:26:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:26:55,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:55,116 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:55,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-21 19:26:55,117 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1137578853, now seen corresponding path program 1 times [2021-10-21 19:26:55,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:55,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055713364] [2021-10-21 19:26:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:55,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:55,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:55,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:55,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055713364] [2021-10-21 19:26:55,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055713364] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:55,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:55,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:55,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623514226] [2021-10-21 19:26:55,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:55,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:55,161 INFO L87 Difference]: Start difference. First operand 14601 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:55,393 INFO L93 Difference]: Finished difference Result 28169 states and 31239 transitions. [2021-10-21 19:26:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2021-10-21 19:26:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:55,418 INFO L225 Difference]: With dead ends: 28169 [2021-10-21 19:26:55,418 INFO L226 Difference]: Without dead ends: 14601 [2021-10-21 19:26:55,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14601 states. [2021-10-21 19:26:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14601 to 14601. [2021-10-21 19:26:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.1051585942316915) internal successors, (16132), 14597 states have internal predecessors, (16132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16135 transitions. [2021-10-21 19:26:55,717 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16135 transitions. Word has length 30 [2021-10-21 19:26:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:55,717 INFO L470 AbstractCegarLoop]: Abstraction has 14601 states and 16135 transitions. [2021-10-21 19:26:55,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16135 transitions. [2021-10-21 19:26:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:26:55,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:55,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:55,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:26:55,733 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:26:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -550772839, now seen corresponding path program 1 times [2021-10-21 19:26:55,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:55,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737487945] [2021-10-21 19:26:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:55,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:55,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:55,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:55,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737487945] [2021-10-21 19:26:55,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737487945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:55,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:55,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:55,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843520393] [2021-10-21 19:26:55,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:55,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:55,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:55,775 INFO L87 Difference]: Start difference. First operand 14601 states and 16135 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:56,002 INFO L93 Difference]: Finished difference Result 14599 states and 15622 transitions. [2021-10-21 19:26:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2021-10-21 19:26:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:56,003 INFO L225 Difference]: With dead ends: 14599 [2021-10-21 19:26:56,003 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:26:56,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:26:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:26:56,005 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) [2021-10-21 19:26:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:26:56,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-10-21 19:26:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:56,006 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:26:56,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:26:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:26:56,006 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:26:56,009 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:26:56,009 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:26:56,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 19:26:56,014 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:26:56,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:26:56 BoogieIcfgContainer [2021-10-21 19:26:56,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:26:56,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:26:56,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:26:56,018 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:26:56,019 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:26:46" (3/4) ... [2021-10-21 19:26:56,023 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:26:56,029 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:26:56,029 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:26:56,030 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:26:56,038 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-21 19:26:56,038 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:26:56,039 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:26:56,039 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:26:56,094 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:26:56,094 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:26:56,096 INFO L168 Benchmark]: Toolchain (without parser) took 9892.12 ms. Allocated memory was 96.5 MB in the beginning and 966.8 MB in the end (delta: 870.3 MB). Free memory was 62.0 MB in the beginning and 742.7 MB in the end (delta: -680.7 MB). Peak memory consumption was 189.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:56,097 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 78.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:26:56,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.79 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 75.4 MB in the end (delta: -13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:56,097 INFO L168 Benchmark]: Boogie Preprocessor took 34.97 ms. Allocated memory is still 96.5 MB. Free memory was 75.4 MB in the beginning and 73.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:26:56,098 INFO L168 Benchmark]: RCFGBuilder took 419.47 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 60.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:56,098 INFO L168 Benchmark]: TraceAbstraction took 9100.29 ms. Allocated memory was 96.5 MB in the beginning and 966.8 MB in the end (delta: 870.3 MB). Free memory was 60.4 MB in the beginning and 746.9 MB in the end (delta: -686.5 MB). Peak memory consumption was 185.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:56,099 INFO L168 Benchmark]: Witness Printer took 76.59 ms. Allocated memory is still 966.8 MB. Free memory was 745.9 MB in the beginning and 742.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:56,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 78.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.79 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 75.4 MB in the end (delta: -13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.97 ms. Allocated memory is still 96.5 MB. Free memory was 75.4 MB in the beginning and 73.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 419.47 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 60.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9100.29 ms. Allocated memory was 96.5 MB in the beginning and 966.8 MB in the end (delta: 870.3 MB). Free memory was 60.4 MB in the beginning and 746.9 MB in the end (delta: -686.5 MB). Peak memory consumption was 185.6 MB. Max. memory is 16.1 GB. * Witness Printer took 76.59 ms. Allocated memory is still 966.8 MB. Free memory was 745.9 MB in the beginning and 742.7 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 163]: 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, 49 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 9024.4ms, OverallIterations: 29, TraceHistogramMax: 1, EmptinessCheckTime: 164.5ms, AutomataDifference: 4315.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2422 SDtfs, 3612 SDslu, 171 SDs, 0 SdLazy, 1705 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1972.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 199 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1064.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14601occurred in iteration=27, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2502.6ms AutomataMinimizationTime, 29 MinimizatonAttempts, 3100 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 67.5ms SsaConstructionTime, 251.5ms SatisfiabilityAnalysisTime, 1364.0ms InterpolantComputationTime, 730 NumberOfCodeBlocks, 730 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 701 ConstructedInterpolants, 0 QuantifiedInterpolants, 2231 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 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! [2021-10-21 19:26:56,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549cb324-1340-42f1-93c9-872408d409af/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...