./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_7.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_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/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_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/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_603e4a0f-4034-41eb-8f01-85ff1d5962cd/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 05c715fd95d2209519e9aa0425ca71b72050ac0ff5d332c8a9deb8ead8471230 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:10:09,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:10:09,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:10:09,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:10:09,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:10:09,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:10:09,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:10:09,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:10:09,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:10:09,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:10:09,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:10:09,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:10:09,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:10:09,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:10:09,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:10:09,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:10:09,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:10:09,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:10:09,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:10:09,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:10:09,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:10:09,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:10:09,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:10:09,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:10:09,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:10:09,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:10:09,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:10:09,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:10:09,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:10:09,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:10:09,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:10:09,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:10:10,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:10:10,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:10:10,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:10:10,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:10:10,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:10:10,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:10:10,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:10:10,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:10:10,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:10:10,010 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:10:10,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:10:10,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:10:10,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:10:10,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:10:10,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:10:10,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:10:10,061 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:10:10,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:10:10,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:10:10,062 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:10:10,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:10:10,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:10:10,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:10:10,063 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:10:10,063 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:10:10,063 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:10:10,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:10:10,063 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:10:10,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:10:10,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:10:10,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:10:10,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:10:10,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:10:10,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:10:10,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:10:10,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:10:10,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:10:10,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:10:10,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:10:10,066 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_603e4a0f-4034-41eb-8f01-85ff1d5962cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05c715fd95d2209519e9aa0425ca71b72050ac0ff5d332c8a9deb8ead8471230 [2021-10-21 19:10:10,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:10:10,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:10:10,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:10:10,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:10:10,383 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:10:10,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/locks/test_locks_7.c [2021-10-21 19:10:10,446 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/data/e5079e38e/83f74699567649d086bba9debcfa8d3e/FLAG1b272ccb3 [2021-10-21 19:10:10,906 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:10:10,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/sv-benchmarks/c/locks/test_locks_7.c [2021-10-21 19:10:10,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/data/e5079e38e/83f74699567649d086bba9debcfa8d3e/FLAG1b272ccb3 [2021-10-21 19:10:11,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/data/e5079e38e/83f74699567649d086bba9debcfa8d3e [2021-10-21 19:10:11,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:10:11,268 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:10:11,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:10:11,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:10:11,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:10:11,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0fda71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11, skipping insertion in model container [2021-10-21 19:10:11,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:10:11,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:10:11,478 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_603e4a0f-4034-41eb-8f01-85ff1d5962cd/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-10-21 19:10:11,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:10:11,495 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:10:11,535 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_603e4a0f-4034-41eb-8f01-85ff1d5962cd/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-10-21 19:10:11,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:10:11,560 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:10:11,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11 WrapperNode [2021-10-21 19:10:11,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:10:11,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:10:11,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:10:11,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:10:11,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:10:11,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:10:11,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:10:11,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:10:11,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (1/1) ... [2021-10-21 19:10:11,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:10:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:11,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:10:11,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:10:11,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:10:11,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:10:11,675 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:10:11,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:10:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:10:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:10:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:10:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:10:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:10:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:10:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:10:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:10:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:10:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:10:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:10:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:10:11,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:10:11,904 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-21 19:10:11,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:10:11 BoogieIcfgContainer [2021-10-21 19:10:11,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:10:11,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:10:11,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:10:11,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:10:11,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:10:11" (1/3) ... [2021-10-21 19:10:11,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2b52c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:10:11, skipping insertion in model container [2021-10-21 19:10:11,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:10:11" (2/3) ... [2021-10-21 19:10:11,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2b52c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:10:11, skipping insertion in model container [2021-10-21 19:10:11,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:10:11" (3/3) ... [2021-10-21 19:10:11,915 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-10-21 19:10:11,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:10:11,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 19:10:11,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:10:11,969 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:10:11,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 19:10:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:10:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:10:11,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:11,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:11,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1226885087, now seen corresponding path program 1 times [2021-10-21 19:10:12,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:12,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500220527] [2021-10-21 19:10:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:12,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:12,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:12,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:12,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500220527] [2021-10-21 19:10:12,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500220527] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:12,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:12,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:10:12,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105937919] [2021-10-21 19:10:12,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:10:12,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:10:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:10:12,305 INFO L87 Difference]: Start difference. First operand has 37 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:12,342 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2021-10-21 19:10:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:10:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-21 19:10:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:12,358 INFO L225 Difference]: With dead ends: 36 [2021-10-21 19:10:12,358 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 19:10:12,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:10:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 19:10:12,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-21 19:10:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2021-10-21 19:10:12,393 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 9 [2021-10-21 19:10:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:12,394 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2021-10-21 19:10:12,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2021-10-21 19:10:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:10:12,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:12,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:12,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:10:12,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1571877732, now seen corresponding path program 1 times [2021-10-21 19:10:12,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:12,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027303166] [2021-10-21 19:10:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:12,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:12,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:12,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027303166] [2021-10-21 19:10:12,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027303166] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:12,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:12,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:12,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788886223] [2021-10-21 19:10:12,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:12,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:12,600 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:12,745 INFO L93 Difference]: Finished difference Result 55 states and 93 transitions. [2021-10-21 19:10:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 19:10:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:12,752 INFO L225 Difference]: With dead ends: 55 [2021-10-21 19:10:12,753 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:10:12,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:10:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-10-21 19:10:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 66 transitions. [2021-10-21 19:10:12,774 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 66 transitions. Word has length 18 [2021-10-21 19:10:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:12,775 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 66 transitions. [2021-10-21 19:10:12,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 66 transitions. [2021-10-21 19:10:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:10:12,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:12,776 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:12,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:10:12,777 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:12,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1964904742, now seen corresponding path program 1 times [2021-10-21 19:10:12,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:12,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160273414] [2021-10-21 19:10:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:12,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:12,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:12,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:12,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160273414] [2021-10-21 19:10:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160273414] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:12,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:12,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:12,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423399865] [2021-10-21 19:10:12,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:12,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:12,908 INFO L87 Difference]: Start difference. First operand 39 states and 66 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:13,057 INFO L93 Difference]: Finished difference Result 55 states and 91 transitions. [2021-10-21 19:10:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:13,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 19:10:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:13,062 INFO L225 Difference]: With dead ends: 55 [2021-10-21 19:10:13,062 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:10:13,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:10:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-10-21 19:10:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 49 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 90 transitions. [2021-10-21 19:10:13,079 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 90 transitions. Word has length 18 [2021-10-21 19:10:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:13,080 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 90 transitions. [2021-10-21 19:10:13,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 90 transitions. [2021-10-21 19:10:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:10:13,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:13,081 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:13,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:10:13,082 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:13,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1483355081, now seen corresponding path program 1 times [2021-10-21 19:10:13,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:13,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358614086] [2021-10-21 19:10:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:13,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:13,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:13,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358614086] [2021-10-21 19:10:13,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358614086] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:13,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:13,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:13,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897636988] [2021-10-21 19:10:13,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:13,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:13,197 INFO L87 Difference]: Start difference. First operand 53 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:13,312 INFO L93 Difference]: Finished difference Result 58 states and 93 transitions. [2021-10-21 19:10:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 19:10:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:13,316 INFO L225 Difference]: With dead ends: 58 [2021-10-21 19:10:13,317 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 19:10:13,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 19:10:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-10-21 19:10:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 92 transitions. [2021-10-21 19:10:13,335 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 92 transitions. Word has length 19 [2021-10-21 19:10:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:13,336 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 92 transitions. [2021-10-21 19:10:13,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 92 transitions. [2021-10-21 19:10:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:10:13,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:13,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:13,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:10:13,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:13,340 INFO L82 PathProgramCache]: Analyzing trace with hash -782290503, now seen corresponding path program 1 times [2021-10-21 19:10:13,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:13,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163639711] [2021-10-21 19:10:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:13,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:13,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:13,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163639711] [2021-10-21 19:10:13,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163639711] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:13,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:13,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:13,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470863073] [2021-10-21 19:10:13,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:13,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:13,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:13,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:13,428 INFO L87 Difference]: Start difference. First operand 56 states and 92 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:13,543 INFO L93 Difference]: Finished difference Result 101 states and 166 transitions. [2021-10-21 19:10:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:13,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 19:10:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:13,546 INFO L225 Difference]: With dead ends: 101 [2021-10-21 19:10:13,547 INFO L226 Difference]: Without dead ends: 101 [2021-10-21 19:10:13,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-21 19:10:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-10-21 19:10:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.7052631578947368) internal successors, (162), 95 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 165 transitions. [2021-10-21 19:10:13,571 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 165 transitions. Word has length 19 [2021-10-21 19:10:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:13,572 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 165 transitions. [2021-10-21 19:10:13,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 165 transitions. [2021-10-21 19:10:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:10:13,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:13,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:13,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:10:13,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash -389263493, now seen corresponding path program 1 times [2021-10-21 19:10:13,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:13,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319122297] [2021-10-21 19:10:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:13,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:13,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:13,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319122297] [2021-10-21 19:10:13,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319122297] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:13,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:13,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:13,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833622307] [2021-10-21 19:10:13,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:13,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:13,643 INFO L87 Difference]: Start difference. First operand 99 states and 165 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:13,736 INFO L93 Difference]: Finished difference Result 125 states and 208 transitions. [2021-10-21 19:10:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:13,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 19:10:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:13,738 INFO L225 Difference]: With dead ends: 125 [2021-10-21 19:10:13,738 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:10:13,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:10:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2021-10-21 19:10:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 95 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 163 transitions. [2021-10-21 19:10:13,745 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 163 transitions. Word has length 19 [2021-10-21 19:10:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:13,745 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 163 transitions. [2021-10-21 19:10:13,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 163 transitions. [2021-10-21 19:10:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:10:13,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:13,747 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 19:10:13,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:10:13,747 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:13,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1519012879, now seen corresponding path program 1 times [2021-10-21 19:10:13,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:13,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070066647] [2021-10-21 19:10:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:13,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:13,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:13,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070066647] [2021-10-21 19:10:13,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070066647] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:13,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:13,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:13,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169701729] [2021-10-21 19:10:13,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:13,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:13,806 INFO L87 Difference]: Start difference. First operand 99 states and 163 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 19:10:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:13,907 INFO L93 Difference]: Finished difference Result 177 states and 294 transitions. [2021-10-21 19:10:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:13,907 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 19:10:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:13,909 INFO L225 Difference]: With dead ends: 177 [2021-10-21 19:10:13,909 INFO L226 Difference]: Without dead ends: 177 [2021-10-21 19:10:13,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-21 19:10:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2021-10-21 19:10:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.6641221374045803) internal successors, (218), 131 states have internal predecessors, (218), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 221 transitions. [2021-10-21 19:10:13,925 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 221 transitions. Word has length 20 [2021-10-21 19:10:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:13,926 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 221 transitions. [2021-10-21 19:10:13,926 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 19:10:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 221 transitions. [2021-10-21 19:10:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:10:13,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:13,932 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 19:10:13,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:10:13,933 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1125985869, now seen corresponding path program 1 times [2021-10-21 19:10:13,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:13,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258653577] [2021-10-21 19:10:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:13,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:14,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258653577] [2021-10-21 19:10:14,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258653577] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:14,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:14,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:14,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995830245] [2021-10-21 19:10:14,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:14,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:14,023 INFO L87 Difference]: Start difference. First operand 135 states and 221 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 19:10:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:14,112 INFO L93 Difference]: Finished difference Result 185 states and 296 transitions. [2021-10-21 19:10:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:14,112 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 19:10:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:14,114 INFO L225 Difference]: With dead ends: 185 [2021-10-21 19:10:14,114 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 19:10:14,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 19:10:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-10-21 19:10:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.6312849162011174) internal successors, (292), 179 states have internal predecessors, (292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 295 transitions. [2021-10-21 19:10:14,124 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 295 transitions. Word has length 20 [2021-10-21 19:10:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:14,125 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 295 transitions. [2021-10-21 19:10:14,126 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 19:10:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 295 transitions. [2021-10-21 19:10:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:10:14,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:14,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:14,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:10:14,130 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash -155025970, now seen corresponding path program 1 times [2021-10-21 19:10:14,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:14,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453244830] [2021-10-21 19:10:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:14,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:14,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453244830] [2021-10-21 19:10:14,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453244830] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:14,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:14,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:14,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276691894] [2021-10-21 19:10:14,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:14,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:14,199 INFO L87 Difference]: Start difference. First operand 183 states and 295 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:14,305 INFO L93 Difference]: Finished difference Result 191 states and 300 transitions. [2021-10-21 19:10:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:10:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:14,307 INFO L225 Difference]: With dead ends: 191 [2021-10-21 19:10:14,307 INFO L226 Difference]: Without dead ends: 191 [2021-10-21 19:10:14,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-21 19:10:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-10-21 19:10:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.6) internal successors, (296), 185 states have internal predecessors, (296), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 299 transitions. [2021-10-21 19:10:14,313 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 299 transitions. Word has length 21 [2021-10-21 19:10:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:14,314 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 299 transitions. [2021-10-21 19:10:14,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 299 transitions. [2021-10-21 19:10:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:10:14,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:14,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:14,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:10:14,315 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:14,315 INFO L82 PathProgramCache]: Analyzing trace with hash 546038608, now seen corresponding path program 1 times [2021-10-21 19:10:14,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:14,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423392746] [2021-10-21 19:10:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:14,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:14,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423392746] [2021-10-21 19:10:14,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423392746] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:14,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:14,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:14,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337323746] [2021-10-21 19:10:14,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:14,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:14,366 INFO L87 Difference]: Start difference. First operand 189 states and 299 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:14,453 INFO L93 Difference]: Finished difference Result 331 states and 524 transitions. [2021-10-21 19:10:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:14,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:10:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:14,456 INFO L225 Difference]: With dead ends: 331 [2021-10-21 19:10:14,457 INFO L226 Difference]: Without dead ends: 331 [2021-10-21 19:10:14,457 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 19:10:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-10-21 19:10:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 265. [2021-10-21 19:10:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.5632183908045978) internal successors, (408), 261 states have internal predecessors, (408), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 411 transitions. [2021-10-21 19:10:14,466 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 411 transitions. Word has length 21 [2021-10-21 19:10:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:14,467 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 411 transitions. [2021-10-21 19:10:14,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 411 transitions. [2021-10-21 19:10:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:10:14,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:14,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:14,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:10:14,469 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash 153011598, now seen corresponding path program 1 times [2021-10-21 19:10:14,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:14,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888534769] [2021-10-21 19:10:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:14,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:14,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888534769] [2021-10-21 19:10:14,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888534769] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:14,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:14,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:14,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014793595] [2021-10-21 19:10:14,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:14,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:14,516 INFO L87 Difference]: Start difference. First operand 265 states and 411 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:14,604 INFO L93 Difference]: Finished difference Result 355 states and 536 transitions. [2021-10-21 19:10:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:14,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:10:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:14,607 INFO L225 Difference]: With dead ends: 355 [2021-10-21 19:10:14,607 INFO L226 Difference]: Without dead ends: 355 [2021-10-21 19:10:14,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-10-21 19:10:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2021-10-21 19:10:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 349 states have (on average 1.524355300859599) internal successors, (532), 349 states have internal predecessors, (532), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 535 transitions. [2021-10-21 19:10:14,641 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 535 transitions. Word has length 21 [2021-10-21 19:10:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:14,641 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 535 transitions. [2021-10-21 19:10:14,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 535 transitions. [2021-10-21 19:10:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:10:14,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:14,643 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:14,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:10:14,644 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:14,644 INFO L82 PathProgramCache]: Analyzing trace with hash -252456958, now seen corresponding path program 1 times [2021-10-21 19:10:14,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:14,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480023277] [2021-10-21 19:10:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:14,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:14,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480023277] [2021-10-21 19:10:14,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480023277] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:14,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:14,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:14,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834230919] [2021-10-21 19:10:14,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:14,694 INFO L87 Difference]: Start difference. First operand 353 states and 535 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:14,781 INFO L93 Difference]: Finished difference Result 363 states and 536 transitions. [2021-10-21 19:10:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 19:10:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:14,784 INFO L225 Difference]: With dead ends: 363 [2021-10-21 19:10:14,785 INFO L226 Difference]: Without dead ends: 363 [2021-10-21 19:10:14,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-10-21 19:10:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2021-10-21 19:10:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.4901960784313726) internal successors, (532), 357 states have internal predecessors, (532), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 535 transitions. [2021-10-21 19:10:14,797 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 535 transitions. Word has length 22 [2021-10-21 19:10:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:14,798 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 535 transitions. [2021-10-21 19:10:14,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 535 transitions. [2021-10-21 19:10:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:10:14,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:14,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:14,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:10:14,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash 448607620, now seen corresponding path program 1 times [2021-10-21 19:10:14,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:14,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120691757] [2021-10-21 19:10:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:14,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:14,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120691757] [2021-10-21 19:10:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120691757] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:14,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:14,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:14,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772433277] [2021-10-21 19:10:14,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:14,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:14,849 INFO L87 Difference]: Start difference. First operand 361 states and 535 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:14,932 INFO L93 Difference]: Finished difference Result 619 states and 912 transitions. [2021-10-21 19:10:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:14,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 19:10:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:14,936 INFO L225 Difference]: With dead ends: 619 [2021-10-21 19:10:14,936 INFO L226 Difference]: Without dead ends: 619 [2021-10-21 19:10:14,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-10-21 19:10:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 521. [2021-10-21 19:10:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.446808510638298) internal successors, (748), 517 states have internal predecessors, (748), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 751 transitions. [2021-10-21 19:10:14,953 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 751 transitions. Word has length 22 [2021-10-21 19:10:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:14,953 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 751 transitions. [2021-10-21 19:10:14,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 751 transitions. [2021-10-21 19:10:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:10:14,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:14,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:14,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:10:14,956 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash 55580610, now seen corresponding path program 1 times [2021-10-21 19:10:14,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:14,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425021351] [2021-10-21 19:10:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:14,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:15,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425021351] [2021-10-21 19:10:15,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425021351] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:15,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:15,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:15,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166843401] [2021-10-21 19:10:15,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:15,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:15,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:15,006 INFO L87 Difference]: Start difference. First operand 521 states and 751 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:15,083 INFO L93 Difference]: Finished difference Result 683 states and 952 transitions. [2021-10-21 19:10:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:15,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 19:10:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:15,088 INFO L225 Difference]: With dead ends: 683 [2021-10-21 19:10:15,088 INFO L226 Difference]: Without dead ends: 683 [2021-10-21 19:10:15,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-10-21 19:10:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 681. [2021-10-21 19:10:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 677 states have (on average 1.4002954209748892) internal successors, (948), 677 states have internal predecessors, (948), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 951 transitions. [2021-10-21 19:10:15,108 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 951 transitions. Word has length 22 [2021-10-21 19:10:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:15,108 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 951 transitions. [2021-10-21 19:10:15,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 951 transitions. [2021-10-21 19:10:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:10:15,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:15,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:15,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:10:15,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1022150051, now seen corresponding path program 1 times [2021-10-21 19:10:15,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:15,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668371210] [2021-10-21 19:10:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:15,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:15,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668371210] [2021-10-21 19:10:15,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668371210] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:15,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:15,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:15,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494454848] [2021-10-21 19:10:15,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:15,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:15,166 INFO L87 Difference]: Start difference. First operand 681 states and 951 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:15,247 INFO L93 Difference]: Finished difference Result 699 states and 952 transitions. [2021-10-21 19:10:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 19:10:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:15,252 INFO L225 Difference]: With dead ends: 699 [2021-10-21 19:10:15,252 INFO L226 Difference]: Without dead ends: 699 [2021-10-21 19:10:15,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-10-21 19:10:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2021-10-21 19:10:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.367965367965368) internal successors, (948), 693 states have internal predecessors, (948), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 951 transitions. [2021-10-21 19:10:15,272 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 951 transitions. Word has length 23 [2021-10-21 19:10:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:15,273 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 951 transitions. [2021-10-21 19:10:15,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 951 transitions. [2021-10-21 19:10:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:10:15,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:15,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:15,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:10:15,275 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:15,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1723214629, now seen corresponding path program 1 times [2021-10-21 19:10:15,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:15,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444616842] [2021-10-21 19:10:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:15,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:15,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444616842] [2021-10-21 19:10:15,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444616842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:15,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:15,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:15,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814428454] [2021-10-21 19:10:15,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:15,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:15,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:15,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:15,337 INFO L87 Difference]: Start difference. First operand 697 states and 951 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:15,420 INFO L93 Difference]: Finished difference Result 1163 states and 1560 transitions. [2021-10-21 19:10:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 19:10:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:15,431 INFO L225 Difference]: With dead ends: 1163 [2021-10-21 19:10:15,432 INFO L226 Difference]: Without dead ends: 1163 [2021-10-21 19:10:15,432 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 19:10:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-10-21 19:10:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1033. [2021-10-21 19:10:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1029 states have (on average 1.3255587949465502) internal successors, (1364), 1029 states have internal predecessors, (1364), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1367 transitions. [2021-10-21 19:10:15,463 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1367 transitions. Word has length 23 [2021-10-21 19:10:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:15,464 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1367 transitions. [2021-10-21 19:10:15,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1367 transitions. [2021-10-21 19:10:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:10:15,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:15,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:15,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:10:15,467 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:15,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1330187619, now seen corresponding path program 1 times [2021-10-21 19:10:15,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:15,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311888537] [2021-10-21 19:10:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:15,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:15,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311888537] [2021-10-21 19:10:15,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311888537] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:15,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:15,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:15,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378328819] [2021-10-21 19:10:15,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:15,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:15,524 INFO L87 Difference]: Start difference. First operand 1033 states and 1367 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:15,607 INFO L93 Difference]: Finished difference Result 1323 states and 1672 transitions. [2021-10-21 19:10:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:15,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 19:10:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:15,615 INFO L225 Difference]: With dead ends: 1323 [2021-10-21 19:10:15,615 INFO L226 Difference]: Without dead ends: 1323 [2021-10-21 19:10:15,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-10-21 19:10:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1321. [2021-10-21 19:10:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1317 states have (on average 1.2665148063781322) internal successors, (1668), 1317 states have internal predecessors, (1668), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1671 transitions. [2021-10-21 19:10:15,653 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1671 transitions. Word has length 23 [2021-10-21 19:10:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:15,654 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1671 transitions. [2021-10-21 19:10:15,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1671 transitions. [2021-10-21 19:10:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:10:15,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:15,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:15,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:10:15,658 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:15,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1880262007, now seen corresponding path program 1 times [2021-10-21 19:10:15,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:15,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519140707] [2021-10-21 19:10:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:15,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:15,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519140707] [2021-10-21 19:10:15,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519140707] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:15,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:15,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:15,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53199234] [2021-10-21 19:10:15,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:15,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:15,706 INFO L87 Difference]: Start difference. First operand 1321 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:15,783 INFO L93 Difference]: Finished difference Result 1355 states and 1672 transitions. [2021-10-21 19:10:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-21 19:10:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:15,790 INFO L225 Difference]: With dead ends: 1355 [2021-10-21 19:10:15,791 INFO L226 Difference]: Without dead ends: 1355 [2021-10-21 19:10:15,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-10-21 19:10:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2021-10-21 19:10:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.2364714603409934) internal successors, (1668), 1349 states have internal predecessors, (1668), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1671 transitions. [2021-10-21 19:10:15,833 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1671 transitions. Word has length 24 [2021-10-21 19:10:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:15,834 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 1671 transitions. [2021-10-21 19:10:15,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1671 transitions. [2021-10-21 19:10:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:10:15,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:15,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:15,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:10:15,837 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:15,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1713640711, now seen corresponding path program 1 times [2021-10-21 19:10:15,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:15,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151456447] [2021-10-21 19:10:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:15,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:15,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151456447] [2021-10-21 19:10:15,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151456447] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:15,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:15,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:15,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831305141] [2021-10-21 19:10:15,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:15,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:15,889 INFO L87 Difference]: Start difference. First operand 1353 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:16,000 INFO L93 Difference]: Finished difference Result 2185 states and 2599 transitions. [2021-10-21 19:10:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:16,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-21 19:10:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:16,012 INFO L225 Difference]: With dead ends: 2185 [2021-10-21 19:10:16,012 INFO L226 Difference]: Without dead ends: 2185 [2021-10-21 19:10:16,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-10-21 19:10:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2057. [2021-10-21 19:10:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2053 states have (on average 1.2021432050657574) internal successors, (2468), 2053 states have internal predecessors, (2468), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 2471 transitions. [2021-10-21 19:10:16,071 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 2471 transitions. Word has length 24 [2021-10-21 19:10:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:16,071 INFO L470 AbstractCegarLoop]: Abstraction has 2057 states and 2471 transitions. [2021-10-21 19:10:16,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 2471 transitions. [2021-10-21 19:10:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:10:16,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:16,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:16,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:10:16,075 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 19:10:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2106667721, now seen corresponding path program 1 times [2021-10-21 19:10:16,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:16,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299590555] [2021-10-21 19:10:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:16,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:16,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:10:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:16,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:16,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299590555] [2021-10-21 19:10:16,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299590555] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:16,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:16,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:10:16,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301318976] [2021-10-21 19:10:16,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:16,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:16,119 INFO L87 Difference]: Start difference. First operand 2057 states and 2471 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:16,205 INFO L93 Difference]: Finished difference Result 2567 states and 2886 transitions. [2021-10-21 19:10:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:10:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-21 19:10:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:16,206 INFO L225 Difference]: With dead ends: 2567 [2021-10-21 19:10:16,206 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:10:16,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:10:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:10:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:10:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:10:16,207 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-10-21 19:10:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:16,207 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:10:16,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:10:16,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:10:16,210 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:10:16,211 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:10:16,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:10:16,216 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:10:16,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:10:16 BoogieIcfgContainer [2021-10-21 19:10:16,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:10:16,220 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:10:16,220 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:10:16,221 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:10:16,221 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:10:11" (3/4) ... [2021-10-21 19:10:16,226 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:10:16,232 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:10:16,232 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:10:16,233 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:10:16,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-21 19:10:16,240 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:10:16,241 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:10:16,241 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:10:16,293 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:10:16,294 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:10:16,296 INFO L168 Benchmark]: Toolchain (without parser) took 5026.20 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 98.1 MB in the beginning and 96.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:16,296 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 134.2 MB. Free memory is still 115.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:10:16,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.99 ms. Allocated memory is still 134.2 MB. Free memory was 97.9 MB in the beginning and 110.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:16,297 INFO L168 Benchmark]: Boogie Preprocessor took 32.85 ms. Allocated memory is still 134.2 MB. Free memory was 110.4 MB in the beginning and 108.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:16,298 INFO L168 Benchmark]: RCFGBuilder took 310.87 ms. Allocated memory is still 134.2 MB. Free memory was 108.6 MB in the beginning and 97.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:16,298 INFO L168 Benchmark]: TraceAbstraction took 4311.22 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 96.5 MB in the beginning and 99.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:16,299 INFO L168 Benchmark]: Witness Printer took 73.51 ms. Allocated memory is still 161.5 MB. Free memory was 99.8 MB in the beginning and 96.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:16,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 134.2 MB. Free memory is still 115.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.99 ms. Allocated memory is still 134.2 MB. Free memory was 97.9 MB in the beginning and 110.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.85 ms. Allocated memory is still 134.2 MB. Free memory was 110.4 MB in the beginning and 108.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 310.87 ms. Allocated memory is still 134.2 MB. Free memory was 108.6 MB in the beginning and 97.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4311.22 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 96.5 MB in the beginning and 99.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 16.1 GB. * Witness Printer took 73.51 ms. Allocated memory is still 161.5 MB. Free memory was 99.8 MB in the beginning and 96.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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: 121]: 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, 40 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 4255.5ms, OverallIterations: 20, TraceHistogramMax: 1, EmptinessCheckTime: 43.5ms, AutomataDifference: 2052.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1233 SDtfs, 1736 SDslu, 117 SDs, 0 SdLazy, 866 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1035.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 767.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2057occurred in iteration=19, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 408.3ms AutomataMinimizationTime, 20 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 46.4ms SsaConstructionTime, 254.0ms SatisfiabilityAnalysisTime, 1126.8ms InterpolantComputationTime, 412 NumberOfCodeBlocks, 412 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 392 ConstructedInterpolants, 0 QuantifiedInterpolants, 1307 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:10:16,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_603e4a0f-4034-41eb-8f01-85ff1d5962cd/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...