./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_9.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_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/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_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/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_9817dad2-c919-4065-ba8b-b8ad0cb4965b/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 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:12:01,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:12:01,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:12:01,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:12:01,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:12:01,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:12:01,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:12:01,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:12:01,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:12:01,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:12:01,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:12:01,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:12:01,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:12:01,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:12:01,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:12:01,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:12:01,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:12:01,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:12:01,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:12:01,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:12:01,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:12:01,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:12:01,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:12:01,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:12:01,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:12:01,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:12:01,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:12:01,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:12:01,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:12:01,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:12:01,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:12:01,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:12:01,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:12:01,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:12:01,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:12:01,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:12:01,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:12:01,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:12:01,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:12:01,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:12:01,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:12:01,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:12:01,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:12:01,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:12:01,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:12:01,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:12:01,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:12:01,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:12:01,321 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:12:01,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:12:01,322 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:12:01,322 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:12:01,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:12:01,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:12:01,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:12:01,324 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:12:01,324 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:12:01,324 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:12:01,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:12:01,325 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:12:01,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:12:01,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:12:01,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:12:01,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:12:01,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:12:01,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:12:01,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:12:01,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:12:01,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:12:01,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:12:01,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:12:01,327 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_9817dad2-c919-4065-ba8b-b8ad0cb4965b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 [2021-10-21 20:12:01,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:12:01,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:12:01,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:12:01,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:12:01,656 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:12:01,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/locks/test_locks_9.c [2021-10-21 20:12:01,719 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/data/9a0641e7d/71cd209032be4242a762cb616bf6f693/FLAG4516aaf1d [2021-10-21 20:12:02,231 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:12:02,235 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/sv-benchmarks/c/locks/test_locks_9.c [2021-10-21 20:12:02,248 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/data/9a0641e7d/71cd209032be4242a762cb616bf6f693/FLAG4516aaf1d [2021-10-21 20:12:02,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/data/9a0641e7d/71cd209032be4242a762cb616bf6f693 [2021-10-21 20:12:02,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:12:02,590 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:12:02,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:12:02,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:12:02,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:12:02,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac55f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02, skipping insertion in model container [2021-10-21 20:12:02,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:12:02,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:12:02,847 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_9817dad2-c919-4065-ba8b-b8ad0cb4965b/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-21 20:12:02,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:12:02,860 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:12:02,883 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_9817dad2-c919-4065-ba8b-b8ad0cb4965b/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-21 20:12:02,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:12:02,898 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:12:02,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02 WrapperNode [2021-10-21 20:12:02,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:12:02,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:12:02,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:12:02,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:12:02,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:12:02,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:12:02,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:12:02,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:12:02,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (1/1) ... [2021-10-21 20:12:02,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:12:02,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:12:02,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:12:02,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:12:03,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:12:03,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:12:03,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 20:12:03,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:12:03,016 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:12:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 20:12:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 20:12:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:12:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:12:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:12:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:12:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:12:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:12:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:12:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:12:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:12:03,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:12:03,372 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-21 20:12:03,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:12:03 BoogieIcfgContainer [2021-10-21 20:12:03,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:12:03,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:12:03,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:12:03,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:12:03,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:12:02" (1/3) ... [2021-10-21 20:12:03,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6574519c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:12:03, skipping insertion in model container [2021-10-21 20:12:03,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:12:02" (2/3) ... [2021-10-21 20:12:03,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6574519c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:12:03, skipping insertion in model container [2021-10-21 20:12:03,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:12:03" (3/3) ... [2021-10-21 20:12:03,383 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-10-21 20:12:03,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:12:03,389 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 20:12:03,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:12:03,440 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 20:12:03,440 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 20:12:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 38 states have internal predecessors, (68), 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 20:12:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:12:03,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:03,464 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:12:03,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:03,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1545970075, now seen corresponding path program 1 times [2021-10-21 20:12:03,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:03,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473908199] [2021-10-21 20:12:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:03,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:03,749 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 20:12:03,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:03,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473908199] [2021-10-21 20:12:03,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473908199] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:03,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:03,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:12:03,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939861183] [2021-10-21 20:12:03,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:12:03,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:12:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:12:03,787 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 38 states have internal predecessors, (68), 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 20:12:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:03,833 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2021-10-21 20:12:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:12:03,835 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 20:12:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:03,845 INFO L225 Difference]: With dead ends: 42 [2021-10-21 20:12:03,845 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 20:12:03,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:12:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 20:12:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-21 20:12:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 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 20:12:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2021-10-21 20:12:03,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 9 [2021-10-21 20:12:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:03,888 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2021-10-21 20:12:03,888 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 20:12:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2021-10-21 20:12:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:12:03,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:03,891 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] [2021-10-21 20:12:03,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:12:03,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1171509738, now seen corresponding path program 1 times [2021-10-21 20:12:03,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:03,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046769529] [2021-10-21 20:12:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:03,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:04,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:04,058 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 20:12:04,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:04,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046769529] [2021-10-21 20:12:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046769529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:04,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:04,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:04,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121378978] [2021-10-21 20:12:04,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:04,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:04,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:04,063 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:04,244 INFO L93 Difference]: Finished difference Result 67 states and 117 transitions. [2021-10-21 20:12:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:04,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 20:12:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:04,246 INFO L225 Difference]: With dead ends: 67 [2021-10-21 20:12:04,246 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 20:12:04,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 20:12:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-10-21 20:12:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 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 20:12:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2021-10-21 20:12:04,256 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 20 [2021-10-21 20:12:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:04,256 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2021-10-21 20:12:04,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2021-10-21 20:12:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:12:04,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:04,258 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] [2021-10-21 20:12:04,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:12:04,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash -913344300, now seen corresponding path program 1 times [2021-10-21 20:12:04,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:04,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425612152] [2021-10-21 20:12:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:04,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:04,448 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 20:12:04,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:04,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425612152] [2021-10-21 20:12:04,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425612152] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:04,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:04,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:04,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373245559] [2021-10-21 20:12:04,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:04,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:04,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:04,456 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:04,662 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-10-21 20:12:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:04,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 20:12:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:04,664 INFO L225 Difference]: With dead ends: 67 [2021-10-21 20:12:04,664 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 20:12:04,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 20:12:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-10-21 20:12:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.819672131147541) internal successors, (111), 61 states have internal predecessors, (111), 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 20:12:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2021-10-21 20:12:04,674 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 20 [2021-10-21 20:12:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:04,675 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2021-10-21 20:12:04,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2021-10-21 20:12:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:12:04,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:04,681 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 20:12:04,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:12:04,682 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:04,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1956849803, now seen corresponding path program 1 times [2021-10-21 20:12:04,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:04,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424673947] [2021-10-21 20:12:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:04,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:04,808 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 20:12:04,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:04,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424673947] [2021-10-21 20:12:04,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424673947] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:04,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:04,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:04,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574599965] [2021-10-21 20:12:04,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:04,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:04,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:04,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:04,811 INFO L87 Difference]: Start difference. First operand 65 states and 114 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 20:12:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:04,948 INFO L93 Difference]: Finished difference Result 70 states and 117 transitions. [2021-10-21 20:12:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:04,949 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 20:12:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:04,956 INFO L225 Difference]: With dead ends: 70 [2021-10-21 20:12:04,956 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:12:04,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:12:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-10-21 20:12:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.765625) internal successors, (113), 64 states have internal predecessors, (113), 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 20:12:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 116 transitions. [2021-10-21 20:12:04,974 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 116 transitions. Word has length 21 [2021-10-21 20:12:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:04,975 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 116 transitions. [2021-10-21 20:12:04,975 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 20:12:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 116 transitions. [2021-10-21 20:12:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:12:04,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:04,977 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 20:12:04,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:12:04,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1751311479, now seen corresponding path program 1 times [2021-10-21 20:12:04,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:04,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668993929] [2021-10-21 20:12:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:04,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,068 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 20:12:05,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:05,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668993929] [2021-10-21 20:12:05,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668993929] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:05,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:05,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:05,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398481375] [2021-10-21 20:12:05,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:05,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:05,071 INFO L87 Difference]: Start difference. First operand 68 states and 116 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 20:12:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:05,211 INFO L93 Difference]: Finished difference Result 125 states and 214 transitions. [2021-10-21 20:12:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:05,213 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 20:12:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:05,215 INFO L225 Difference]: With dead ends: 125 [2021-10-21 20:12:05,216 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 20:12:05,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 20:12:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-10-21 20:12:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.7647058823529411) internal successors, (210), 119 states have internal predecessors, (210), 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 20:12:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 213 transitions. [2021-10-21 20:12:05,242 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 213 transitions. Word has length 21 [2021-10-21 20:12:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:05,243 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 213 transitions. [2021-10-21 20:12:05,243 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 20:12:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 213 transitions. [2021-10-21 20:12:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:12:05,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:05,248 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 20:12:05,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:12:05,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1493146041, now seen corresponding path program 1 times [2021-10-21 20:12:05,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:05,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988721097] [2021-10-21 20:12:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:05,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,368 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 20:12:05,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:05,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988721097] [2021-10-21 20:12:05,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988721097] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:05,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:05,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:05,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842376509] [2021-10-21 20:12:05,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:05,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:05,374 INFO L87 Difference]: Start difference. First operand 123 states and 213 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 20:12:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:05,517 INFO L93 Difference]: Finished difference Result 157 states and 272 transitions. [2021-10-21 20:12:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:05,518 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 20:12:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:05,520 INFO L225 Difference]: With dead ends: 157 [2021-10-21 20:12:05,520 INFO L226 Difference]: Without dead ends: 157 [2021-10-21 20:12:05,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-21 20:12:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 123. [2021-10-21 20:12:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.7478991596638656) internal successors, (208), 119 states have internal predecessors, (208), 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 20:12:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 211 transitions. [2021-10-21 20:12:05,543 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 211 transitions. Word has length 21 [2021-10-21 20:12:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:05,543 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 211 transitions. [2021-10-21 20:12:05,543 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 20:12:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 211 transitions. [2021-10-21 20:12:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:12:05,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:05,547 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 20:12:05,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:12:05,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1543704951, now seen corresponding path program 1 times [2021-10-21 20:12:05,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:05,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476991373] [2021-10-21 20:12:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:05,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,602 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 20:12:05,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:05,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476991373] [2021-10-21 20:12:05,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476991373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:05,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:05,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:05,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754762747] [2021-10-21 20:12:05,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:05,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:05,604 INFO L87 Difference]: Start difference. First operand 123 states and 211 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 20:12:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:05,718 INFO L93 Difference]: Finished difference Result 225 states and 390 transitions. [2021-10-21 20:12:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:05,718 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 20:12:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:05,721 INFO L225 Difference]: With dead ends: 225 [2021-10-21 20:12:05,722 INFO L226 Difference]: Without dead ends: 225 [2021-10-21 20:12:05,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-21 20:12:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 167. [2021-10-21 20:12:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.7300613496932515) internal successors, (282), 163 states have internal predecessors, (282), 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 20:12:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 285 transitions. [2021-10-21 20:12:05,735 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 285 transitions. Word has length 22 [2021-10-21 20:12:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:05,737 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 285 transitions. [2021-10-21 20:12:05,738 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 20:12:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 285 transitions. [2021-10-21 20:12:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:12:05,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:05,744 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 20:12:05,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:12:05,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1285539513, now seen corresponding path program 1 times [2021-10-21 20:12:05,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:05,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719738558] [2021-10-21 20:12:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:05,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,804 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 20:12:05,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:05,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719738558] [2021-10-21 20:12:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719738558] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:05,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:05,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:05,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878200447] [2021-10-21 20:12:05,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:05,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:05,807 INFO L87 Difference]: Start difference. First operand 167 states and 285 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 20:12:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:05,931 INFO L93 Difference]: Finished difference Result 233 states and 392 transitions. [2021-10-21 20:12:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:05,931 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 20:12:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:05,933 INFO L225 Difference]: With dead ends: 233 [2021-10-21 20:12:05,934 INFO L226 Difference]: Without dead ends: 233 [2021-10-21 20:12:05,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-21 20:12:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2021-10-21 20:12:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.7092511013215859) internal successors, (388), 227 states have internal predecessors, (388), 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 20:12:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 391 transitions. [2021-10-21 20:12:05,942 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 391 transitions. Word has length 22 [2021-10-21 20:12:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:05,942 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 391 transitions. [2021-10-21 20:12:05,942 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 20:12:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 391 transitions. [2021-10-21 20:12:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:12:05,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:05,944 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 20:12:05,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:12:05,944 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -609998836, now seen corresponding path program 1 times [2021-10-21 20:12:05,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:05,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688981085] [2021-10-21 20:12:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:05,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:05,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,000 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 20:12:06,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:06,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688981085] [2021-10-21 20:12:06,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688981085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:06,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:06,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:06,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501592301] [2021-10-21 20:12:06,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:06,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:06,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:06,006 INFO L87 Difference]: Start difference. First operand 231 states and 391 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 20:12:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:06,121 INFO L93 Difference]: Finished difference Result 239 states and 396 transitions. [2021-10-21 20:12:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:06,121 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 20:12:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:06,123 INFO L225 Difference]: With dead ends: 239 [2021-10-21 20:12:06,123 INFO L226 Difference]: Without dead ends: 239 [2021-10-21 20:12:06,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-21 20:12:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-10-21 20:12:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.6824034334763949) internal successors, (392), 233 states have internal predecessors, (392), 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 20:12:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 395 transitions. [2021-10-21 20:12:06,131 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 395 transitions. Word has length 23 [2021-10-21 20:12:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:06,131 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 395 transitions. [2021-10-21 20:12:06,132 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 20:12:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 395 transitions. [2021-10-21 20:12:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:12:06,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:06,133 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 20:12:06,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:12:06,133 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1196804850, now seen corresponding path program 1 times [2021-10-21 20:12:06,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:06,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185289241] [2021-10-21 20:12:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:06,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,197 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 20:12:06,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:06,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185289241] [2021-10-21 20:12:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185289241] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:06,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:06,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:06,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339327474] [2021-10-21 20:12:06,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:06,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:06,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:06,200 INFO L87 Difference]: Start difference. First operand 237 states and 395 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 20:12:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:06,315 INFO L93 Difference]: Finished difference Result 427 states and 716 transitions. [2021-10-21 20:12:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:06,315 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 20:12:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:06,320 INFO L225 Difference]: With dead ends: 427 [2021-10-21 20:12:06,320 INFO L226 Difference]: Without dead ends: 427 [2021-10-21 20:12:06,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-10-21 20:12:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 329. [2021-10-21 20:12:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.6492307692307693) internal successors, (536), 325 states have internal predecessors, (536), 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 20:12:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 539 transitions. [2021-10-21 20:12:06,331 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 539 transitions. Word has length 23 [2021-10-21 20:12:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:06,332 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 539 transitions. [2021-10-21 20:12:06,332 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 20:12:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 539 transitions. [2021-10-21 20:12:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:12:06,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:06,336 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 20:12:06,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:12:06,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:06,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash -938639412, now seen corresponding path program 1 times [2021-10-21 20:12:06,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:06,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587979397] [2021-10-21 20:12:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:06,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,406 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 20:12:06,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:06,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587979397] [2021-10-21 20:12:06,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587979397] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:06,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:06,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:06,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545607607] [2021-10-21 20:12:06,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:06,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:06,410 INFO L87 Difference]: Start difference. First operand 329 states and 539 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 20:12:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:06,509 INFO L93 Difference]: Finished difference Result 451 states and 728 transitions. [2021-10-21 20:12:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:06,509 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 20:12:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:06,512 INFO L225 Difference]: With dead ends: 451 [2021-10-21 20:12:06,513 INFO L226 Difference]: Without dead ends: 451 [2021-10-21 20:12:06,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-21 20:12:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2021-10-21 20:12:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.6269662921348316) internal successors, (724), 445 states have internal predecessors, (724), 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 20:12:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 727 transitions. [2021-10-21 20:12:06,526 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 727 transitions. Word has length 23 [2021-10-21 20:12:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:06,528 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 727 transitions. [2021-10-21 20:12:06,528 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 20:12:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 727 transitions. [2021-10-21 20:12:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:12:06,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:06,529 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 20:12:06,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 20:12:06,529 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1553970044, now seen corresponding path program 1 times [2021-10-21 20:12:06,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:06,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095756226] [2021-10-21 20:12:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:06,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,603 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 20:12:06,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:06,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095756226] [2021-10-21 20:12:06,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095756226] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:06,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:06,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:06,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868784171] [2021-10-21 20:12:06,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:06,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:06,606 INFO L87 Difference]: Start difference. First operand 449 states and 727 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 20:12:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:06,703 INFO L93 Difference]: Finished difference Result 459 states and 728 transitions. [2021-10-21 20:12:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:06,704 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 20:12:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:06,707 INFO L225 Difference]: With dead ends: 459 [2021-10-21 20:12:06,707 INFO L226 Difference]: Without dead ends: 459 [2021-10-21 20:12:06,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-10-21 20:12:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2021-10-21 20:12:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.598233995584989) internal successors, (724), 453 states have internal predecessors, (724), 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 20:12:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 727 transitions. [2021-10-21 20:12:06,720 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 727 transitions. Word has length 24 [2021-10-21 20:12:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:06,720 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 727 transitions. [2021-10-21 20:12:06,721 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 20:12:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 727 transitions. [2021-10-21 20:12:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:12:06,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:06,722 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 20:12:06,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:12:06,722 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:06,723 INFO L82 PathProgramCache]: Analyzing trace with hash 967164030, now seen corresponding path program 1 times [2021-10-21 20:12:06,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:06,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638833996] [2021-10-21 20:12:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:06,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,766 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 20:12:06,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:06,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638833996] [2021-10-21 20:12:06,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638833996] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:06,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:06,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:06,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515730974] [2021-10-21 20:12:06,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:06,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:06,769 INFO L87 Difference]: Start difference. First operand 457 states and 727 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 20:12:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:06,866 INFO L93 Difference]: Finished difference Result 811 states and 1296 transitions. [2021-10-21 20:12:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:06,867 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 20:12:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:06,872 INFO L225 Difference]: With dead ends: 811 [2021-10-21 20:12:06,872 INFO L226 Difference]: Without dead ends: 811 [2021-10-21 20:12:06,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-10-21 20:12:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 649. [2021-10-21 20:12:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.5565891472868216) internal successors, (1004), 645 states have internal predecessors, (1004), 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 20:12:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1007 transitions. [2021-10-21 20:12:06,891 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1007 transitions. Word has length 24 [2021-10-21 20:12:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:06,891 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1007 transitions. [2021-10-21 20:12:06,891 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 20:12:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1007 transitions. [2021-10-21 20:12:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:12:06,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:06,893 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] [2021-10-21 20:12:06,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 20:12:06,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:06,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1225329468, now seen corresponding path program 1 times [2021-10-21 20:12:06,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:06,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097867679] [2021-10-21 20:12:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:06,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:06,940 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 20:12:06,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:06,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097867679] [2021-10-21 20:12:06,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097867679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:06,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:06,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:06,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523203443] [2021-10-21 20:12:06,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:06,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:06,943 INFO L87 Difference]: Start difference. First operand 649 states and 1007 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 20:12:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:07,039 INFO L93 Difference]: Finished difference Result 875 states and 1336 transitions. [2021-10-21 20:12:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:07,039 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 20:12:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:07,044 INFO L225 Difference]: With dead ends: 875 [2021-10-21 20:12:07,045 INFO L226 Difference]: Without dead ends: 875 [2021-10-21 20:12:07,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-10-21 20:12:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2021-10-21 20:12:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 869 states have (on average 1.532796317606444) internal successors, (1332), 869 states have internal predecessors, (1332), 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 20:12:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1335 transitions. [2021-10-21 20:12:07,068 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1335 transitions. Word has length 24 [2021-10-21 20:12:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:07,069 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1335 transitions. [2021-10-21 20:12:07,069 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 20:12:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1335 transitions. [2021-10-21 20:12:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:12:07,070 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:07,070 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 20:12:07,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 20:12:07,071 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:07,071 INFO L82 PathProgramCache]: Analyzing trace with hash -82471071, now seen corresponding path program 1 times [2021-10-21 20:12:07,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:07,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488909070] [2021-10-21 20:12:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:07,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,117 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 20:12:07,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:07,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488909070] [2021-10-21 20:12:07,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488909070] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:07,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:07,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:07,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860245358] [2021-10-21 20:12:07,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:07,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:07,119 INFO L87 Difference]: Start difference. First operand 873 states and 1335 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 20:12:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:07,218 INFO L93 Difference]: Finished difference Result 891 states and 1336 transitions. [2021-10-21 20:12:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:07,219 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 20:12:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:07,224 INFO L225 Difference]: With dead ends: 891 [2021-10-21 20:12:07,224 INFO L226 Difference]: Without dead ends: 891 [2021-10-21 20:12:07,224 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 20:12:07,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-10-21 20:12:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 889. [2021-10-21 20:12:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 885 states have (on average 1.505084745762712) internal successors, (1332), 885 states have internal predecessors, (1332), 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 20:12:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1335 transitions. [2021-10-21 20:12:07,247 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1335 transitions. Word has length 25 [2021-10-21 20:12:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:07,247 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1335 transitions. [2021-10-21 20:12:07,248 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 20:12:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1335 transitions. [2021-10-21 20:12:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:12:07,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:07,249 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 20:12:07,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 20:12:07,250 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:07,250 INFO L82 PathProgramCache]: Analyzing trace with hash -669277085, now seen corresponding path program 1 times [2021-10-21 20:12:07,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:07,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982248676] [2021-10-21 20:12:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:07,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,292 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 20:12:07,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:07,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982248676] [2021-10-21 20:12:07,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982248676] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:07,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:07,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:07,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848954805] [2021-10-21 20:12:07,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:07,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:07,294 INFO L87 Difference]: Start difference. First operand 889 states and 1335 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 20:12:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:07,404 INFO L93 Difference]: Finished difference Result 1547 states and 2328 transitions. [2021-10-21 20:12:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:07,405 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 20:12:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:07,413 INFO L225 Difference]: With dead ends: 1547 [2021-10-21 20:12:07,414 INFO L226 Difference]: Without dead ends: 1547 [2021-10-21 20:12:07,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-10-21 20:12:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1289. [2021-10-21 20:12:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1285 states have (on average 1.4599221789883268) internal successors, (1876), 1285 states have internal predecessors, (1876), 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 20:12:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1879 transitions. [2021-10-21 20:12:07,448 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1879 transitions. Word has length 25 [2021-10-21 20:12:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:07,449 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 1879 transitions. [2021-10-21 20:12:07,449 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 20:12:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1879 transitions. [2021-10-21 20:12:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:12:07,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:07,452 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 20:12:07,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 20:12:07,452 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:07,453 INFO L82 PathProgramCache]: Analyzing trace with hash -411111647, now seen corresponding path program 1 times [2021-10-21 20:12:07,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:07,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5018511] [2021-10-21 20:12:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:07,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,499 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 20:12:07,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:07,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5018511] [2021-10-21 20:12:07,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5018511] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:07,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:07,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:07,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230579886] [2021-10-21 20:12:07,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:07,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:07,502 INFO L87 Difference]: Start difference. First operand 1289 states and 1879 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 20:12:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:07,610 INFO L93 Difference]: Finished difference Result 1707 states and 2440 transitions. [2021-10-21 20:12:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:07,610 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 20:12:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:07,619 INFO L225 Difference]: With dead ends: 1707 [2021-10-21 20:12:07,619 INFO L226 Difference]: Without dead ends: 1707 [2021-10-21 20:12:07,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-21 20:12:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1705. [2021-10-21 20:12:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1701 states have (on average 1.4320987654320987) internal successors, (2436), 1701 states have internal predecessors, (2436), 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 20:12:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2439 transitions. [2021-10-21 20:12:07,664 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2439 transitions. Word has length 25 [2021-10-21 20:12:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:07,665 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 2439 transitions. [2021-10-21 20:12:07,665 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 20:12:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2439 transitions. [2021-10-21 20:12:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:12:07,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:07,668 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, 1, 1, 1, 1] [2021-10-21 20:12:07,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 20:12:07,668 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash 727462257, now seen corresponding path program 1 times [2021-10-21 20:12:07,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:07,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276927881] [2021-10-21 20:12:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:07,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,708 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 20:12:07,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:07,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276927881] [2021-10-21 20:12:07,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276927881] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:07,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:07,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:07,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244776092] [2021-10-21 20:12:07,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:07,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:07,711 INFO L87 Difference]: Start difference. First operand 1705 states and 2439 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 20:12:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:07,828 INFO L93 Difference]: Finished difference Result 1739 states and 2440 transitions. [2021-10-21 20:12:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:07,828 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 20:12:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:07,838 INFO L225 Difference]: With dead ends: 1739 [2021-10-21 20:12:07,838 INFO L226 Difference]: Without dead ends: 1739 [2021-10-21 20:12:07,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-10-21 20:12:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1737. [2021-10-21 20:12:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1733 states have (on average 1.4056549336410848) internal successors, (2436), 1733 states have internal predecessors, (2436), 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 20:12:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2439 transitions. [2021-10-21 20:12:07,885 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2439 transitions. Word has length 26 [2021-10-21 20:12:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:07,886 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2439 transitions. [2021-10-21 20:12:07,886 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 20:12:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2439 transitions. [2021-10-21 20:12:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:12:07,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:07,889 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 20:12:07,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 20:12:07,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash 140656243, now seen corresponding path program 1 times [2021-10-21 20:12:07,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:07,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396381538] [2021-10-21 20:12:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:07,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:07,933 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 20:12:07,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:07,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396381538] [2021-10-21 20:12:07,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396381538] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:07,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:07,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:07,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265525610] [2021-10-21 20:12:07,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:07,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:07,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:07,936 INFO L87 Difference]: Start difference. First operand 1737 states and 2439 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 20:12:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:08,061 INFO L93 Difference]: Finished difference Result 2955 states and 4136 transitions. [2021-10-21 20:12:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:08,062 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 20:12:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:08,077 INFO L225 Difference]: With dead ends: 2955 [2021-10-21 20:12:08,077 INFO L226 Difference]: Without dead ends: 2955 [2021-10-21 20:12:08,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-10-21 20:12:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2569. [2021-10-21 20:12:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2565 states have (on average 1.3614035087719298) internal successors, (3492), 2565 states have internal predecessors, (3492), 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 20:12:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3495 transitions. [2021-10-21 20:12:08,168 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3495 transitions. Word has length 26 [2021-10-21 20:12:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:08,169 INFO L470 AbstractCegarLoop]: Abstraction has 2569 states and 3495 transitions. [2021-10-21 20:12:08,169 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 20:12:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3495 transitions. [2021-10-21 20:12:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:12:08,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:08,173 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 20:12:08,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 20:12:08,174 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash 398821681, now seen corresponding path program 1 times [2021-10-21 20:12:08,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:08,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663768814] [2021-10-21 20:12:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:08,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,216 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 20:12:08,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:08,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663768814] [2021-10-21 20:12:08,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663768814] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:08,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:08,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:08,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205822854] [2021-10-21 20:12:08,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:08,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:08,218 INFO L87 Difference]: Start difference. First operand 2569 states and 3495 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 20:12:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:08,336 INFO L93 Difference]: Finished difference Result 3339 states and 4424 transitions. [2021-10-21 20:12:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:08,336 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 20:12:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:08,352 INFO L225 Difference]: With dead ends: 3339 [2021-10-21 20:12:08,353 INFO L226 Difference]: Without dead ends: 3339 [2021-10-21 20:12:08,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-10-21 20:12:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3337. [2021-10-21 20:12:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.326132613261326) internal successors, (4420), 3333 states have internal predecessors, (4420), 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 20:12:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4423 transitions. [2021-10-21 20:12:08,459 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4423 transitions. Word has length 26 [2021-10-21 20:12:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:08,459 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 4423 transitions. [2021-10-21 20:12:08,459 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 20:12:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4423 transitions. [2021-10-21 20:12:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:12:08,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:08,464 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 20:12:08,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 20:12:08,464 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 65591990, now seen corresponding path program 1 times [2021-10-21 20:12:08,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:08,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185360756] [2021-10-21 20:12:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:08,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,504 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 20:12:08,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:08,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185360756] [2021-10-21 20:12:08,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185360756] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:08,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:08,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:08,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677873624] [2021-10-21 20:12:08,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:08,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:08,507 INFO L87 Difference]: Start difference. First operand 3337 states and 4423 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 20:12:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:08,627 INFO L93 Difference]: Finished difference Result 3403 states and 4424 transitions. [2021-10-21 20:12:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:08,628 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 20:12:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:08,644 INFO L225 Difference]: With dead ends: 3403 [2021-10-21 20:12:08,644 INFO L226 Difference]: Without dead ends: 3403 [2021-10-21 20:12:08,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-10-21 20:12:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3401. [2021-10-21 20:12:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3397 states have (on average 1.3011480718280837) internal successors, (4420), 3397 states have internal predecessors, (4420), 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 20:12:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 4423 transitions. [2021-10-21 20:12:08,750 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 4423 transitions. Word has length 27 [2021-10-21 20:12:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:08,751 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 4423 transitions. [2021-10-21 20:12:08,751 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 20:12:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 4423 transitions. [2021-10-21 20:12:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:12:08,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:08,756 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 20:12:08,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 20:12:08,757 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash -521214024, now seen corresponding path program 1 times [2021-10-21 20:12:08,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:08,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100006402] [2021-10-21 20:12:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:08,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:08,814 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 20:12:08,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:08,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100006402] [2021-10-21 20:12:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100006402] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:08,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:08,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:08,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867436176] [2021-10-21 20:12:08,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:08,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:08,817 INFO L87 Difference]: Start difference. First operand 3401 states and 4423 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 20:12:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:08,928 INFO L93 Difference]: Finished difference Result 5643 states and 7240 transitions. [2021-10-21 20:12:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:08,930 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 20:12:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:08,959 INFO L225 Difference]: With dead ends: 5643 [2021-10-21 20:12:08,959 INFO L226 Difference]: Without dead ends: 5643 [2021-10-21 20:12:08,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2021-10-21 20:12:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5129. [2021-10-21 20:12:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 5125 states have (on average 1.2620487804878049) internal successors, (6468), 5125 states have internal predecessors, (6468), 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 20:12:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 6471 transitions. [2021-10-21 20:12:09,101 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 6471 transitions. Word has length 27 [2021-10-21 20:12:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:09,102 INFO L470 AbstractCegarLoop]: Abstraction has 5129 states and 6471 transitions. [2021-10-21 20:12:09,102 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 20:12:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 6471 transitions. [2021-10-21 20:12:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:12:09,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:09,110 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, 1, 1, 1, 1] [2021-10-21 20:12:09,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 20:12:09,110 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash -263048586, now seen corresponding path program 1 times [2021-10-21 20:12:09,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:09,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783133289] [2021-10-21 20:12:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:09,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:09,150 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 20:12:09,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:09,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783133289] [2021-10-21 20:12:09,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783133289] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:09,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:09,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:09,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229168640] [2021-10-21 20:12:09,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:09,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:09,152 INFO L87 Difference]: Start difference. First operand 5129 states and 6471 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 20:12:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:09,264 INFO L93 Difference]: Finished difference Result 6539 states and 7944 transitions. [2021-10-21 20:12:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:09,264 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 20:12:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:09,278 INFO L225 Difference]: With dead ends: 6539 [2021-10-21 20:12:09,278 INFO L226 Difference]: Without dead ends: 6539 [2021-10-21 20:12:09,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-10-21 20:12:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6537. [2021-10-21 20:12:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6537 states, 6533 states have (on average 1.2153681310270932) internal successors, (7940), 6533 states have internal predecessors, (7940), 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 20:12:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 7943 transitions. [2021-10-21 20:12:09,450 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 7943 transitions. Word has length 27 [2021-10-21 20:12:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:09,450 INFO L470 AbstractCegarLoop]: Abstraction has 6537 states and 7943 transitions. [2021-10-21 20:12:09,451 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 20:12:09,451 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 7943 transitions. [2021-10-21 20:12:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:12:09,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:09,459 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 20:12:09,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 20:12:09,460 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1022450534, now seen corresponding path program 1 times [2021-10-21 20:12:09,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:09,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018503106] [2021-10-21 20:12:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:09,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:09,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:09,539 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 20:12:09,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:09,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018503106] [2021-10-21 20:12:09,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018503106] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:09,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:09,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:09,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721621616] [2021-10-21 20:12:09,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:09,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:09,542 INFO L87 Difference]: Start difference. First operand 6537 states and 7943 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 20:12:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:09,657 INFO L93 Difference]: Finished difference Result 6667 states and 7944 transitions. [2021-10-21 20:12:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:09,657 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 20:12:09,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:09,670 INFO L225 Difference]: With dead ends: 6667 [2021-10-21 20:12:09,670 INFO L226 Difference]: Without dead ends: 6667 [2021-10-21 20:12:09,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-10-21 20:12:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6665. [2021-10-21 20:12:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.1920132112295452) internal successors, (7940), 6661 states have internal predecessors, (7940), 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 20:12:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 7943 transitions. [2021-10-21 20:12:09,847 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 7943 transitions. Word has length 28 [2021-10-21 20:12:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:09,847 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 7943 transitions. [2021-10-21 20:12:09,848 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 20:12:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 7943 transitions. [2021-10-21 20:12:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:12:09,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:09,858 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 20:12:09,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 20:12:09,859 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash 435644520, now seen corresponding path program 1 times [2021-10-21 20:12:09,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:09,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213399047] [2021-10-21 20:12:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:09,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:09,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:09,907 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 20:12:09,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:09,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213399047] [2021-10-21 20:12:09,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213399047] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:09,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:09,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:09,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520963012] [2021-10-21 20:12:09,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:09,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:09,909 INFO L87 Difference]: Start difference. First operand 6665 states and 7943 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 20:12:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:10,048 INFO L93 Difference]: Finished difference Result 10761 states and 12423 transitions. [2021-10-21 20:12:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:10,049 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 20:12:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:10,070 INFO L225 Difference]: With dead ends: 10761 [2021-10-21 20:12:10,070 INFO L226 Difference]: Without dead ends: 10761 [2021-10-21 20:12:10,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:10,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10761 states. [2021-10-21 20:12:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10761 to 10249. [2021-10-21 20:12:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10249 states, 10245 states have (on average 1.16232308443143) internal successors, (11908), 10245 states have internal predecessors, (11908), 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 20:12:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 11911 transitions. [2021-10-21 20:12:10,299 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 11911 transitions. Word has length 28 [2021-10-21 20:12:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:10,300 INFO L470 AbstractCegarLoop]: Abstraction has 10249 states and 11911 transitions. [2021-10-21 20:12:10,300 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 20:12:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 11911 transitions. [2021-10-21 20:12:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:12:10,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:12:10,316 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 20:12:10,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-21 20:12:10,317 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:12:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:12:10,317 INFO L82 PathProgramCache]: Analyzing trace with hash 693809958, now seen corresponding path program 1 times [2021-10-21 20:12:10,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:12:10,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520899894] [2021-10-21 20:12:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:12:10,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:12:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:12:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:12:10,427 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 20:12:10,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:12:10,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520899894] [2021-10-21 20:12:10,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520899894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:12:10,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:12:10,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:12:10,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549843531] [2021-10-21 20:12:10,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:12:10,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:10,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:12:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:12:10,430 INFO L87 Difference]: Start difference. First operand 10249 states and 11911 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 20:12:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:10,560 INFO L93 Difference]: Finished difference Result 12807 states and 14086 transitions. [2021-10-21 20:12:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:12:10,560 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 20:12:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:10,561 INFO L225 Difference]: With dead ends: 12807 [2021-10-21 20:12:10,561 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:12:10,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:12:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:12:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:12:10,562 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 20:12:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:12:10,562 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-10-21 20:12:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:10,562 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:12:10,563 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 20:12:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:12:10,563 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:12:10,565 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 20:12:10,566 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:12:10,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 20:12:10,571 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:12:10,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:12:10 BoogieIcfgContainer [2021-10-21 20:12:10,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:12:10,574 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:12:10,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:12:10,574 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:12:10,575 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:12:03" (3/4) ... [2021-10-21 20:12:10,578 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:12:10,584 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 20:12:10,585 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 20:12:10,585 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 20:12:10,591 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-21 20:12:10,591 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:12:10,592 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 20:12:10,592 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:12:10,635 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:12:10,636 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:12:10,637 INFO L168 Benchmark]: Toolchain (without parser) took 8046.94 ms. Allocated memory was 88.1 MB in the beginning and 262.1 MB in the end (delta: 174.1 MB). Free memory was 48.2 MB in the beginning and 119.9 MB in the end (delta: -71.6 MB). Peak memory consumption was 100.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:10,638 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 88.1 MB. Free memory was 64.5 MB in the beginning and 64.5 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:12:10,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.72 ms. Allocated memory is still 88.1 MB. Free memory was 48.0 MB in the beginning and 60.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:10,639 INFO L168 Benchmark]: Boogie Preprocessor took 37.71 ms. Allocated memory is still 88.1 MB. Free memory was 60.6 MB in the beginning and 59.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:12:10,639 INFO L168 Benchmark]: RCFGBuilder took 436.20 ms. Allocated memory is still 88.1 MB. Free memory was 58.9 MB in the beginning and 46.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:10,640 INFO L168 Benchmark]: TraceAbstraction took 7197.30 ms. Allocated memory was 88.1 MB in the beginning and 262.1 MB in the end (delta: 174.1 MB). Free memory was 46.3 MB in the beginning and 124.1 MB in the end (delta: -77.7 MB). Peak memory consumption was 96.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:10,640 INFO L168 Benchmark]: Witness Printer took 61.89 ms. Allocated memory is still 262.1 MB. Free memory was 124.1 MB in the beginning and 119.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:10,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 88.1 MB. Free memory was 64.5 MB in the beginning and 64.5 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.72 ms. Allocated memory is still 88.1 MB. Free memory was 48.0 MB in the beginning and 60.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.71 ms. Allocated memory is still 88.1 MB. Free memory was 60.6 MB in the beginning and 59.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 436.20 ms. Allocated memory is still 88.1 MB. Free memory was 58.9 MB in the beginning and 46.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7197.30 ms. Allocated memory was 88.1 MB in the beginning and 262.1 MB in the end (delta: 174.1 MB). Free memory was 46.3 MB in the beginning and 124.1 MB in the end (delta: -77.7 MB). Peak memory consumption was 96.5 MB. Max. memory is 16.1 GB. * Witness Printer took 61.89 ms. Allocated memory is still 262.1 MB. Free memory was 124.1 MB in the beginning and 119.9 MB in the end (delta: 4.2 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: 149]: 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, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 7139.5ms, OverallIterations: 26, TraceHistogramMax: 1, EmptinessCheckTime: 108.0ms, AutomataDifference: 3398.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2001 SDtfs, 2914 SDslu, 153 SDs, 0 SdLazy, 1413 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1712.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1087.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10249occurred in iteration=25, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1378.2ms AutomataMinimizationTime, 26 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 65.4ms SsaConstructionTime, 320.6ms SatisfiabilityAnalysisTime, 1503.4ms InterpolantComputationTime, 615 NumberOfCodeBlocks, 615 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 589 ConstructedInterpolants, 0 QuantifiedInterpolants, 1900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 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 20:12:10,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9817dad2-c919-4065-ba8b-b8ad0cb4965b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...