./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:37:14,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:37:14,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:37:14,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:37:14,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:37:14,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:37:14,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:37:14,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:37:14,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:37:14,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:37:14,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:37:14,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:37:14,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:37:14,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:37:14,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:37:14,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:37:14,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:37:14,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:37:14,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:37:14,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:37:14,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:37:14,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:37:14,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:37:14,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:37:14,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:37:14,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:37:14,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:37:14,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:37:14,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:37:14,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:37:14,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:37:14,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:37:14,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:37:14,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:37:14,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:37:14,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:37:14,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:37:14,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:37:14,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:37:14,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:37:14,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:37:14,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:37:14,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:37:14,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:37:14,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:37:14,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:37:14,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:37:14,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:37:14,897 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:37:14,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:37:14,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:37:14,897 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:37:14,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:37:14,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:37:14,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:37:14,898 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:37:14,898 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:37:14,898 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:37:14,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:37:14,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:37:14,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:37:14,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:37:14,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:37:14,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:37:14,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:37:14,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:37:14,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:37:14,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:37:14,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:37:14,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:37:14,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:37:14,901 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_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 [2021-10-28 23:37:15,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:37:15,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:37:15,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:37:15,220 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:37:15,222 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:37:15,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/locks/test_locks_9.c [2021-10-28 23:37:15,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/data/154404d91/02e7368b75514683bfcc1909de80e01a/FLAGbef3034b4 [2021-10-28 23:37:15,821 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:37:15,822 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/sv-benchmarks/c/locks/test_locks_9.c [2021-10-28 23:37:15,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/data/154404d91/02e7368b75514683bfcc1909de80e01a/FLAGbef3034b4 [2021-10-28 23:37:16,154 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/data/154404d91/02e7368b75514683bfcc1909de80e01a [2021-10-28 23:37:16,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:37:16,159 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:37:16,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:37:16,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:37:16,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:37:16,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22aca022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16, skipping insertion in model container [2021-10-28 23:37:16,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:37:16,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:37:16,440 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_dda5fddb-2795-44be-a013-e7b0c01f153d/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-28 23:37:16,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:37:16,454 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:37:16,479 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_dda5fddb-2795-44be-a013-e7b0c01f153d/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-28 23:37:16,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:37:16,496 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:37:16,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16 WrapperNode [2021-10-28 23:37:16,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:37:16,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:37:16,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:37:16,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:37:16,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:37:16,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:37:16,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:37:16,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:37:16,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (1/1) ... [2021-10-28 23:37:16,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:37:16,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:37:16,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:37:16,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:37:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:37:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:37:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:37:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:37:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:37:16,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:37:16,637 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:37:16,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:37:16,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:37:16,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:37:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:37:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:37:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:37:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:37:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:37:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:37:16,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:37:16,951 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-28 23:37:16,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:37:16 BoogieIcfgContainer [2021-10-28 23:37:16,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:37:16,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:37:16,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:37:16,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:37:16,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:37:16" (1/3) ... [2021-10-28 23:37:16,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630eed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:37:16, skipping insertion in model container [2021-10-28 23:37:16,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:37:16" (2/3) ... [2021-10-28 23:37:16,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630eed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:37:16, skipping insertion in model container [2021-10-28 23:37:16,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:37:16" (3/3) ... [2021-10-28 23:37:16,963 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-10-28 23:37:16,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:37:16,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 23:37:17,017 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:37:17,024 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:37:17,024 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 23:37:17,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 38 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:37:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 23:37:17,051 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:17,052 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:17,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1545970075, now seen corresponding path program 1 times [2021-10-28 23:37:17,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:17,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284605640] [2021-10-28 23:37:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:17,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:17,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:17,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284605640] [2021-10-28 23:37:17,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284605640] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:17,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:17,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:37:17,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646365205] [2021-10-28 23:37:17,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:37:17,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:37:17,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:37:17,353 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 38 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:17,391 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2021-10-28 23:37:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:37:17,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-28 23:37:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:17,401 INFO L225 Difference]: With dead ends: 42 [2021-10-28 23:37:17,401 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 23:37:17,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:37:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 23:37:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-28 23:37:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2021-10-28 23:37:17,435 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 9 [2021-10-28 23:37:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:17,435 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2021-10-28 23:37:17,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2021-10-28 23:37:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:37:17,437 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:17,437 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:17,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:37:17,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1171509738, now seen corresponding path program 1 times [2021-10-28 23:37:17,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:17,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426589885] [2021-10-28 23:37:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:17,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:17,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:17,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:17,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426589885] [2021-10-28 23:37:17,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426589885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:17,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:17,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:17,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779839737] [2021-10-28 23:37:17,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:17,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:17,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:17,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:17,621 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:17,772 INFO L93 Difference]: Finished difference Result 67 states and 117 transitions. [2021-10-28 23:37:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 23:37:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:17,774 INFO L225 Difference]: With dead ends: 67 [2021-10-28 23:37:17,775 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 23:37:17,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 23:37:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-10-28 23:37:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2021-10-28 23:37:17,784 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 20 [2021-10-28 23:37:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:17,785 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2021-10-28 23:37:17,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2021-10-28 23:37:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:37:17,786 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:17,787 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:17,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:37:17,787 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash -913344300, now seen corresponding path program 1 times [2021-10-28 23:37:17,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:17,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150810715] [2021-10-28 23:37:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:17,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:17,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:17,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:17,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150810715] [2021-10-28 23:37:17,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150810715] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:17,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:17,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:17,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027912239] [2021-10-28 23:37:17,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:17,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:17,878 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:18,058 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-10-28 23:37:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 23:37:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:18,066 INFO L225 Difference]: With dead ends: 67 [2021-10-28 23:37:18,067 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 23:37:18,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 23:37:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-10-28 23:37:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.819672131147541) internal successors, (111), 61 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2021-10-28 23:37:18,091 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 20 [2021-10-28 23:37:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:18,092 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2021-10-28 23:37:18,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2021-10-28 23:37:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:37:18,095 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:18,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:18,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:37:18,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1956849803, now seen corresponding path program 1 times [2021-10-28 23:37:18,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:18,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778414898] [2021-10-28 23:37:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:18,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:18,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:18,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778414898] [2021-10-28 23:37:18,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778414898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:18,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:18,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:18,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226054866] [2021-10-28 23:37:18,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:18,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:18,232 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:18,407 INFO L93 Difference]: Finished difference Result 70 states and 117 transitions. [2021-10-28 23:37:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:18,408 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 [2021-10-28 23:37:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:18,412 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:37:18,412 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 23:37:18,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 23:37:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-10-28 23:37:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.765625) internal successors, (113), 64 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 116 transitions. [2021-10-28 23:37:18,437 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 116 transitions. Word has length 21 [2021-10-28 23:37:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:18,438 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 116 transitions. [2021-10-28 23:37:18,438 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) [2021-10-28 23:37:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 116 transitions. [2021-10-28 23:37:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:37:18,440 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:18,441 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:18,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:37:18,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1751311479, now seen corresponding path program 1 times [2021-10-28 23:37:18,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:18,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50849196] [2021-10-28 23:37:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:18,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:18,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:18,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:18,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50849196] [2021-10-28 23:37:18,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50849196] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:18,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:18,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:18,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583224975] [2021-10-28 23:37:18,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:18,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:18,575 INFO L87 Difference]: Start difference. First operand 68 states and 116 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:18,708 INFO L93 Difference]: Finished difference Result 125 states and 214 transitions. [2021-10-28 23:37:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:18,710 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 [2021-10-28 23:37:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:18,711 INFO L225 Difference]: With dead ends: 125 [2021-10-28 23:37:18,712 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 23:37:18,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 23:37:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-10-28 23:37:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.7647058823529411) internal successors, (210), 119 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 213 transitions. [2021-10-28 23:37:18,730 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 213 transitions. Word has length 21 [2021-10-28 23:37:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:18,731 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 213 transitions. [2021-10-28 23:37:18,731 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) [2021-10-28 23:37:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 213 transitions. [2021-10-28 23:37:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:37:18,733 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:18,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:18,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:37:18,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1493146041, now seen corresponding path program 1 times [2021-10-28 23:37:18,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:18,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921641458] [2021-10-28 23:37:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:18,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:18,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:18,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:18,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921641458] [2021-10-28 23:37:18,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921641458] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:18,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:18,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:18,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915768477] [2021-10-28 23:37:18,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:18,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:18,848 INFO L87 Difference]: Start difference. First operand 123 states and 213 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:18,969 INFO L93 Difference]: Finished difference Result 157 states and 272 transitions. [2021-10-28 23:37:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:18,970 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 [2021-10-28 23:37:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:18,971 INFO L225 Difference]: With dead ends: 157 [2021-10-28 23:37:18,971 INFO L226 Difference]: Without dead ends: 157 [2021-10-28 23:37:18,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-28 23:37:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 123. [2021-10-28 23:37:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.7478991596638656) internal successors, (208), 119 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 211 transitions. [2021-10-28 23:37:18,998 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 211 transitions. Word has length 21 [2021-10-28 23:37:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:18,999 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 211 transitions. [2021-10-28 23:37:18,999 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) [2021-10-28 23:37:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 211 transitions. [2021-10-28 23:37:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:37:19,007 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:19,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:19,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:37:19,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1543704951, now seen corresponding path program 1 times [2021-10-28 23:37:19,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:19,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925512468] [2021-10-28 23:37:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:19,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:19,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:19,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925512468] [2021-10-28 23:37:19,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925512468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:19,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:19,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:19,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923325501] [2021-10-28 23:37:19,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:19,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:19,092 INFO L87 Difference]: Start difference. First operand 123 states and 211 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:19,211 INFO L93 Difference]: Finished difference Result 225 states and 390 transitions. [2021-10-28 23:37:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:19,212 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 [2021-10-28 23:37:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:19,215 INFO L225 Difference]: With dead ends: 225 [2021-10-28 23:37:19,215 INFO L226 Difference]: Without dead ends: 225 [2021-10-28 23:37:19,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-28 23:37:19,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 167. [2021-10-28 23:37:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.7300613496932515) internal successors, (282), 163 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 285 transitions. [2021-10-28 23:37:19,224 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 285 transitions. Word has length 22 [2021-10-28 23:37:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:19,226 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 285 transitions. [2021-10-28 23:37:19,226 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) [2021-10-28 23:37:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 285 transitions. [2021-10-28 23:37:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:37:19,228 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:19,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:19,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:37:19,228 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1285539513, now seen corresponding path program 1 times [2021-10-28 23:37:19,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:19,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931525043] [2021-10-28 23:37:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:19,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:19,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:19,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931525043] [2021-10-28 23:37:19,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931525043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:19,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:19,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:19,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494389546] [2021-10-28 23:37:19,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:19,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:19,318 INFO L87 Difference]: Start difference. First operand 167 states and 285 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:19,439 INFO L93 Difference]: Finished difference Result 233 states and 392 transitions. [2021-10-28 23:37:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:19,439 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 [2021-10-28 23:37:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:19,442 INFO L225 Difference]: With dead ends: 233 [2021-10-28 23:37:19,442 INFO L226 Difference]: Without dead ends: 233 [2021-10-28 23:37:19,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-28 23:37:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2021-10-28 23:37:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.7092511013215859) internal successors, (388), 227 states have internal predecessors, (388), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 391 transitions. [2021-10-28 23:37:19,449 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 391 transitions. Word has length 22 [2021-10-28 23:37:19,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:19,449 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 391 transitions. [2021-10-28 23:37:19,449 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) [2021-10-28 23:37:19,449 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 391 transitions. [2021-10-28 23:37:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:37:19,450 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:19,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:19,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:37:19,451 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash -609998836, now seen corresponding path program 1 times [2021-10-28 23:37:19,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:19,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583977797] [2021-10-28 23:37:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:19,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:19,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:19,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583977797] [2021-10-28 23:37:19,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583977797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:19,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:19,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:19,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769746085] [2021-10-28 23:37:19,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:19,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:19,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:19,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:19,522 INFO L87 Difference]: Start difference. First operand 231 states and 391 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:19,631 INFO L93 Difference]: Finished difference Result 239 states and 396 transitions. [2021-10-28 23:37:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:19,632 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 [2021-10-28 23:37:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:19,634 INFO L225 Difference]: With dead ends: 239 [2021-10-28 23:37:19,634 INFO L226 Difference]: Without dead ends: 239 [2021-10-28 23:37:19,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-28 23:37:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-10-28 23:37:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.6824034334763949) internal successors, (392), 233 states have internal predecessors, (392), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 395 transitions. [2021-10-28 23:37:19,641 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 395 transitions. Word has length 23 [2021-10-28 23:37:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:19,642 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 395 transitions. [2021-10-28 23:37:19,642 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) [2021-10-28 23:37:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 395 transitions. [2021-10-28 23:37:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:37:19,643 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:19,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:19,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:37:19,644 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1196804850, now seen corresponding path program 1 times [2021-10-28 23:37:19,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:19,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869866707] [2021-10-28 23:37:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:19,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:19,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:19,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869866707] [2021-10-28 23:37:19,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869866707] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:19,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:19,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:19,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257682218] [2021-10-28 23:37:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:19,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:19,717 INFO L87 Difference]: Start difference. First operand 237 states and 395 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:19,855 INFO L93 Difference]: Finished difference Result 427 states and 716 transitions. [2021-10-28 23:37:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:19,856 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 [2021-10-28 23:37:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:19,859 INFO L225 Difference]: With dead ends: 427 [2021-10-28 23:37:19,860 INFO L226 Difference]: Without dead ends: 427 [2021-10-28 23:37:19,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-10-28 23:37:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 329. [2021-10-28 23:37:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.6492307692307693) internal successors, (536), 325 states have internal predecessors, (536), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 539 transitions. [2021-10-28 23:37:19,873 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 539 transitions. Word has length 23 [2021-10-28 23:37:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:19,873 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 539 transitions. [2021-10-28 23:37:19,874 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) [2021-10-28 23:37:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 539 transitions. [2021-10-28 23:37:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:37:19,875 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:19,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:19,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:37:19,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash -938639412, now seen corresponding path program 1 times [2021-10-28 23:37:19,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:19,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125302294] [2021-10-28 23:37:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:19,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:19,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:19,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125302294] [2021-10-28 23:37:19,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125302294] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:19,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:19,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:19,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937631307] [2021-10-28 23:37:19,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:19,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:19,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:19,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:19,938 INFO L87 Difference]: Start difference. First operand 329 states and 539 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:20,069 INFO L93 Difference]: Finished difference Result 451 states and 728 transitions. [2021-10-28 23:37:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:20,070 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 [2021-10-28 23:37:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:20,073 INFO L225 Difference]: With dead ends: 451 [2021-10-28 23:37:20,073 INFO L226 Difference]: Without dead ends: 451 [2021-10-28 23:37:20,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-28 23:37:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2021-10-28 23:37:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.6269662921348316) internal successors, (724), 445 states have internal predecessors, (724), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 727 transitions. [2021-10-28 23:37:20,089 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 727 transitions. Word has length 23 [2021-10-28 23:37:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:20,090 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 727 transitions. [2021-10-28 23:37:20,090 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) [2021-10-28 23:37:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 727 transitions. [2021-10-28 23:37:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:37:20,091 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:20,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:20,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:37:20,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1553970044, now seen corresponding path program 1 times [2021-10-28 23:37:20,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:20,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053362657] [2021-10-28 23:37:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:20,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:20,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:20,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053362657] [2021-10-28 23:37:20,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053362657] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:20,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:20,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:20,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832376922] [2021-10-28 23:37:20,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:20,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:20,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:20,163 INFO L87 Difference]: Start difference. First operand 449 states and 727 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:20,278 INFO L93 Difference]: Finished difference Result 459 states and 728 transitions. [2021-10-28 23:37:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:20,279 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 [2021-10-28 23:37:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:20,282 INFO L225 Difference]: With dead ends: 459 [2021-10-28 23:37:20,282 INFO L226 Difference]: Without dead ends: 459 [2021-10-28 23:37:20,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-10-28 23:37:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2021-10-28 23:37:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.598233995584989) internal successors, (724), 453 states have internal predecessors, (724), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 727 transitions. [2021-10-28 23:37:20,299 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 727 transitions. Word has length 24 [2021-10-28 23:37:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:20,299 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 727 transitions. [2021-10-28 23:37:20,299 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) [2021-10-28 23:37:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 727 transitions. [2021-10-28 23:37:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:37:20,301 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:20,301 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:20,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:37:20,301 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 967164030, now seen corresponding path program 1 times [2021-10-28 23:37:20,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:20,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085597651] [2021-10-28 23:37:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:20,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:20,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:20,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085597651] [2021-10-28 23:37:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085597651] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:20,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:20,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:20,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275910288] [2021-10-28 23:37:20,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:20,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:20,358 INFO L87 Difference]: Start difference. First operand 457 states and 727 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:20,495 INFO L93 Difference]: Finished difference Result 811 states and 1296 transitions. [2021-10-28 23:37:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:20,495 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 [2021-10-28 23:37:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:20,501 INFO L225 Difference]: With dead ends: 811 [2021-10-28 23:37:20,501 INFO L226 Difference]: Without dead ends: 811 [2021-10-28 23:37:20,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-10-28 23:37:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 649. [2021-10-28 23:37:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.5565891472868216) internal successors, (1004), 645 states have internal predecessors, (1004), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1007 transitions. [2021-10-28 23:37:20,525 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1007 transitions. Word has length 24 [2021-10-28 23:37:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:20,525 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1007 transitions. [2021-10-28 23:37:20,525 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) [2021-10-28 23:37:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1007 transitions. [2021-10-28 23:37:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:37:20,527 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:20,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 23:37:20,528 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1225329468, now seen corresponding path program 1 times [2021-10-28 23:37:20,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:20,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193971519] [2021-10-28 23:37:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:20,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:20,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:20,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193971519] [2021-10-28 23:37:20,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193971519] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:20,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:20,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:20,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980072763] [2021-10-28 23:37:20,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:20,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:20,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:20,593 INFO L87 Difference]: Start difference. First operand 649 states and 1007 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:20,744 INFO L93 Difference]: Finished difference Result 875 states and 1336 transitions. [2021-10-28 23:37:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:20,744 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 [2021-10-28 23:37:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:20,751 INFO L225 Difference]: With dead ends: 875 [2021-10-28 23:37:20,751 INFO L226 Difference]: Without dead ends: 875 [2021-10-28 23:37:20,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-10-28 23:37:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2021-10-28 23:37:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 869 states have (on average 1.532796317606444) internal successors, (1332), 869 states have internal predecessors, (1332), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1335 transitions. [2021-10-28 23:37:20,785 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1335 transitions. Word has length 24 [2021-10-28 23:37:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:20,785 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1335 transitions. [2021-10-28 23:37:20,786 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) [2021-10-28 23:37:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1335 transitions. [2021-10-28 23:37:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:37:20,788 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:20,788 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:20,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 23:37:20,788 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash -82471071, now seen corresponding path program 1 times [2021-10-28 23:37:20,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:20,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646033783] [2021-10-28 23:37:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:20,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:20,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:20,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646033783] [2021-10-28 23:37:20,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646033783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:20,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:20,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:20,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803596579] [2021-10-28 23:37:20,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:20,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:20,845 INFO L87 Difference]: Start difference. First operand 873 states and 1335 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:20,967 INFO L93 Difference]: Finished difference Result 891 states and 1336 transitions. [2021-10-28 23:37:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-28 23:37:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:20,974 INFO L225 Difference]: With dead ends: 891 [2021-10-28 23:37:20,974 INFO L226 Difference]: Without dead ends: 891 [2021-10-28 23:37:20,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-10-28 23:37:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 889. [2021-10-28 23:37:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 885 states have (on average 1.505084745762712) internal successors, (1332), 885 states have internal predecessors, (1332), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1335 transitions. [2021-10-28 23:37:21,003 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1335 transitions. Word has length 25 [2021-10-28 23:37:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:21,003 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1335 transitions. [2021-10-28 23:37:21,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1335 transitions. [2021-10-28 23:37:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:37:21,005 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:21,005 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:21,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 23:37:21,006 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash -669277085, now seen corresponding path program 1 times [2021-10-28 23:37:21,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:21,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972388222] [2021-10-28 23:37:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:21,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:21,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:21,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972388222] [2021-10-28 23:37:21,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972388222] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:21,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:21,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:21,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611208021] [2021-10-28 23:37:21,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:21,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:21,057 INFO L87 Difference]: Start difference. First operand 889 states and 1335 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:21,184 INFO L93 Difference]: Finished difference Result 1547 states and 2328 transitions. [2021-10-28 23:37:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-28 23:37:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:21,196 INFO L225 Difference]: With dead ends: 1547 [2021-10-28 23:37:21,196 INFO L226 Difference]: Without dead ends: 1547 [2021-10-28 23:37:21,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-10-28 23:37:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1289. [2021-10-28 23:37:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1285 states have (on average 1.4599221789883268) internal successors, (1876), 1285 states have internal predecessors, (1876), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1879 transitions. [2021-10-28 23:37:21,244 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1879 transitions. Word has length 25 [2021-10-28 23:37:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:21,245 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 1879 transitions. [2021-10-28 23:37:21,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1879 transitions. [2021-10-28 23:37:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:37:21,248 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:21,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:21,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 23:37:21,248 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:21,249 INFO L85 PathProgramCache]: Analyzing trace with hash -411111647, now seen corresponding path program 1 times [2021-10-28 23:37:21,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:21,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204626183] [2021-10-28 23:37:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:21,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:21,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:21,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204626183] [2021-10-28 23:37:21,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204626183] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:21,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:21,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:21,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209045278] [2021-10-28 23:37:21,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:21,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:21,301 INFO L87 Difference]: Start difference. First operand 1289 states and 1879 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:21,466 INFO L93 Difference]: Finished difference Result 1707 states and 2440 transitions. [2021-10-28 23:37:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-28 23:37:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:21,478 INFO L225 Difference]: With dead ends: 1707 [2021-10-28 23:37:21,479 INFO L226 Difference]: Without dead ends: 1707 [2021-10-28 23:37:21,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-28 23:37:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1705. [2021-10-28 23:37:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1701 states have (on average 1.4320987654320987) internal successors, (2436), 1701 states have internal predecessors, (2436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2439 transitions. [2021-10-28 23:37:21,546 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2439 transitions. Word has length 25 [2021-10-28 23:37:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:21,546 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 2439 transitions. [2021-10-28 23:37:21,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2439 transitions. [2021-10-28 23:37:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:37:21,550 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:21,550 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 23:37:21,551 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash 727462257, now seen corresponding path program 1 times [2021-10-28 23:37:21,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:21,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136091093] [2021-10-28 23:37:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:21,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:21,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:21,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136091093] [2021-10-28 23:37:21,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136091093] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:21,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:21,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:21,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427338363] [2021-10-28 23:37:21,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:21,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:21,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:21,610 INFO L87 Difference]: Start difference. First operand 1705 states and 2439 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:21,736 INFO L93 Difference]: Finished difference Result 1739 states and 2440 transitions. [2021-10-28 23:37:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 23:37:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:21,747 INFO L225 Difference]: With dead ends: 1739 [2021-10-28 23:37:21,747 INFO L226 Difference]: Without dead ends: 1739 [2021-10-28 23:37:21,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-10-28 23:37:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1737. [2021-10-28 23:37:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1733 states have (on average 1.4056549336410848) internal successors, (2436), 1733 states have internal predecessors, (2436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2439 transitions. [2021-10-28 23:37:21,802 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2439 transitions. Word has length 26 [2021-10-28 23:37:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2439 transitions. [2021-10-28 23:37:21,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2439 transitions. [2021-10-28 23:37:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:37:21,805 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:21,805 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:21,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 23:37:21,806 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:21,806 INFO L85 PathProgramCache]: Analyzing trace with hash 140656243, now seen corresponding path program 1 times [2021-10-28 23:37:21,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:21,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343644063] [2021-10-28 23:37:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:21,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:21,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:21,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343644063] [2021-10-28 23:37:21,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343644063] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:21,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:21,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:21,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328431683] [2021-10-28 23:37:21,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:21,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:21,848 INFO L87 Difference]: Start difference. First operand 1737 states and 2439 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:21,967 INFO L93 Difference]: Finished difference Result 2955 states and 4136 transitions. [2021-10-28 23:37:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 23:37:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:21,986 INFO L225 Difference]: With dead ends: 2955 [2021-10-28 23:37:21,986 INFO L226 Difference]: Without dead ends: 2955 [2021-10-28 23:37:21,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-10-28 23:37:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2569. [2021-10-28 23:37:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2565 states have (on average 1.3614035087719298) internal successors, (3492), 2565 states have internal predecessors, (3492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3495 transitions. [2021-10-28 23:37:22,078 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3495 transitions. Word has length 26 [2021-10-28 23:37:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:22,079 INFO L470 AbstractCegarLoop]: Abstraction has 2569 states and 3495 transitions. [2021-10-28 23:37:22,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3495 transitions. [2021-10-28 23:37:22,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:37:22,084 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:22,084 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:22,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 23:37:22,085 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash 398821681, now seen corresponding path program 1 times [2021-10-28 23:37:22,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:22,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660744888] [2021-10-28 23:37:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:22,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:22,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:22,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660744888] [2021-10-28 23:37:22,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660744888] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:22,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:22,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:22,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450121864] [2021-10-28 23:37:22,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:22,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:22,141 INFO L87 Difference]: Start difference. First operand 2569 states and 3495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:22,276 INFO L93 Difference]: Finished difference Result 3339 states and 4424 transitions. [2021-10-28 23:37:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 23:37:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:22,297 INFO L225 Difference]: With dead ends: 3339 [2021-10-28 23:37:22,297 INFO L226 Difference]: Without dead ends: 3339 [2021-10-28 23:37:22,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-10-28 23:37:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3337. [2021-10-28 23:37:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.326132613261326) internal successors, (4420), 3333 states have internal predecessors, (4420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4423 transitions. [2021-10-28 23:37:22,395 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4423 transitions. Word has length 26 [2021-10-28 23:37:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:22,396 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 4423 transitions. [2021-10-28 23:37:22,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4423 transitions. [2021-10-28 23:37:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:37:22,402 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:22,402 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:22,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 23:37:22,403 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash 65591990, now seen corresponding path program 1 times [2021-10-28 23:37:22,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:22,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009908117] [2021-10-28 23:37:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:22,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:22,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:22,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:22,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009908117] [2021-10-28 23:37:22,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009908117] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:22,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:22,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:22,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678186862] [2021-10-28 23:37:22,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:22,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:22,459 INFO L87 Difference]: Start difference. First operand 3337 states and 4423 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:22,622 INFO L93 Difference]: Finished difference Result 3403 states and 4424 transitions. [2021-10-28 23:37:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 23:37:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:22,644 INFO L225 Difference]: With dead ends: 3403 [2021-10-28 23:37:22,644 INFO L226 Difference]: Without dead ends: 3403 [2021-10-28 23:37:22,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-10-28 23:37:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3401. [2021-10-28 23:37:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3397 states have (on average 1.3011480718280837) internal successors, (4420), 3397 states have internal predecessors, (4420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 4423 transitions. [2021-10-28 23:37:22,742 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 4423 transitions. Word has length 27 [2021-10-28 23:37:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:22,743 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 4423 transitions. [2021-10-28 23:37:22,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 4423 transitions. [2021-10-28 23:37:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:37:22,749 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:22,749 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:22,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 23:37:22,749 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash -521214024, now seen corresponding path program 1 times [2021-10-28 23:37:22,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:22,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746336931] [2021-10-28 23:37:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:22,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:22,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746336931] [2021-10-28 23:37:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746336931] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:22,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:22,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:22,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249679089] [2021-10-28 23:37:22,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:22,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:22,801 INFO L87 Difference]: Start difference. First operand 3401 states and 4423 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:22,936 INFO L93 Difference]: Finished difference Result 5643 states and 7240 transitions. [2021-10-28 23:37:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:22,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 23:37:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:22,974 INFO L225 Difference]: With dead ends: 5643 [2021-10-28 23:37:22,974 INFO L226 Difference]: Without dead ends: 5643 [2021-10-28 23:37:22,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2021-10-28 23:37:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5129. [2021-10-28 23:37:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 5125 states have (on average 1.2620487804878049) internal successors, (6468), 5125 states have internal predecessors, (6468), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 6471 transitions. [2021-10-28 23:37:23,134 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 6471 transitions. Word has length 27 [2021-10-28 23:37:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:23,134 INFO L470 AbstractCegarLoop]: Abstraction has 5129 states and 6471 transitions. [2021-10-28 23:37:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 6471 transitions. [2021-10-28 23:37:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:37:23,145 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:23,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 23:37:23,146 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -263048586, now seen corresponding path program 1 times [2021-10-28 23:37:23,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:23,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347528881] [2021-10-28 23:37:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:23,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:23,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:23,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:23,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347528881] [2021-10-28 23:37:23,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347528881] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:23,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:23,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:23,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801933869] [2021-10-28 23:37:23,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:23,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:23,213 INFO L87 Difference]: Start difference. First operand 5129 states and 6471 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:23,384 INFO L93 Difference]: Finished difference Result 6539 states and 7944 transitions. [2021-10-28 23:37:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:23,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 23:37:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:23,407 INFO L225 Difference]: With dead ends: 6539 [2021-10-28 23:37:23,407 INFO L226 Difference]: Without dead ends: 6539 [2021-10-28 23:37:23,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-10-28 23:37:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6537. [2021-10-28 23:37:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6537 states, 6533 states have (on average 1.2153681310270932) internal successors, (7940), 6533 states have internal predecessors, (7940), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 7943 transitions. [2021-10-28 23:37:23,561 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 7943 transitions. Word has length 27 [2021-10-28 23:37:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 6537 states and 7943 transitions. [2021-10-28 23:37:23,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 7943 transitions. [2021-10-28 23:37:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:37:23,630 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:23,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:23,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 23:37:23,631 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1022450534, now seen corresponding path program 1 times [2021-10-28 23:37:23,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:23,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638890242] [2021-10-28 23:37:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:23,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:23,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:23,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:23,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638890242] [2021-10-28 23:37:23,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638890242] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:23,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:23,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:23,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39488305] [2021-10-28 23:37:23,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:23,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:23,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:23,686 INFO L87 Difference]: Start difference. First operand 6537 states and 7943 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:23,830 INFO L93 Difference]: Finished difference Result 6667 states and 7944 transitions. [2021-10-28 23:37:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-28 23:37:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:23,848 INFO L225 Difference]: With dead ends: 6667 [2021-10-28 23:37:23,848 INFO L226 Difference]: Without dead ends: 6667 [2021-10-28 23:37:23,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-10-28 23:37:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6665. [2021-10-28 23:37:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.1920132112295452) internal successors, (7940), 6661 states have internal predecessors, (7940), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 7943 transitions. [2021-10-28 23:37:24,010 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 7943 transitions. Word has length 28 [2021-10-28 23:37:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:24,010 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 7943 transitions. [2021-10-28 23:37:24,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 7943 transitions. [2021-10-28 23:37:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:37:24,022 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:24,022 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:24,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-28 23:37:24,022 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 435644520, now seen corresponding path program 1 times [2021-10-28 23:37:24,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:24,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302483959] [2021-10-28 23:37:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:24,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:24,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:24,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:24,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302483959] [2021-10-28 23:37:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302483959] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:24,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:24,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:24,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438662739] [2021-10-28 23:37:24,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:24,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:24,076 INFO L87 Difference]: Start difference. First operand 6665 states and 7943 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:24,273 INFO L93 Difference]: Finished difference Result 10761 states and 12423 transitions. [2021-10-28 23:37:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:24,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-28 23:37:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:24,298 INFO L225 Difference]: With dead ends: 10761 [2021-10-28 23:37:24,298 INFO L226 Difference]: Without dead ends: 10761 [2021-10-28 23:37:24,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10761 states. [2021-10-28 23:37:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10761 to 10249. [2021-10-28 23:37:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10249 states, 10245 states have (on average 1.16232308443143) internal successors, (11908), 10245 states have internal predecessors, (11908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 11911 transitions. [2021-10-28 23:37:24,536 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 11911 transitions. Word has length 28 [2021-10-28 23:37:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:24,537 INFO L470 AbstractCegarLoop]: Abstraction has 10249 states and 11911 transitions. [2021-10-28 23:37:24,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 11911 transitions. [2021-10-28 23:37:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:37:24,556 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:37:24,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:24,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-28 23:37:24,557 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 23:37:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:37:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash 693809958, now seen corresponding path program 1 times [2021-10-28 23:37:24,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:37:24,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932981698] [2021-10-28 23:37:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:37:24,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:37:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:24,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:37:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:37:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:37:24,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:37:24,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932981698] [2021-10-28 23:37:24,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932981698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:37:24,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:37:24,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:37:24,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285653876] [2021-10-28 23:37:24,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:37:24,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:37:24,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:37:24,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:37:24,613 INFO L87 Difference]: Start difference. First operand 10249 states and 11911 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:37:24,767 INFO L93 Difference]: Finished difference Result 12807 states and 14086 transitions. [2021-10-28 23:37:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:37:24,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-28 23:37:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:37:24,768 INFO L225 Difference]: With dead ends: 12807 [2021-10-28 23:37:24,768 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:37:24,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:37:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:37:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:37:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:37:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:37:24,770 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-10-28 23:37:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:37:24,770 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:37:24,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:37:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:37:24,771 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:37:24,774 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:37:24,774 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:37:24,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 23:37:24,779 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:37:24,784 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:37:24,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:37:24 BoogieIcfgContainer [2021-10-28 23:37:24,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:37:24,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:37:24,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:37:24,792 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:37:24,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:37:16" (3/4) ... [2021-10-28 23:37:24,796 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:37:24,803 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 23:37:24,803 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 23:37:24,804 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 23:37:24,810 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-28 23:37:24,811 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:37:24,811 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 23:37:24,812 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:37:24,867 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:37:24,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:37:24,869 INFO L168 Benchmark]: Toolchain (without parser) took 8709.13 ms. Allocated memory was 90.2 MB in the beginning and 184.5 MB in the end (delta: 94.4 MB). Free memory was 57.6 MB in the beginning and 56.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 94.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:37:24,870 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 43.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:37:24,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.80 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 57.4 MB in the beginning and 95.0 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:37:24,871 INFO L168 Benchmark]: Boogie Preprocessor took 41.09 ms. Allocated memory is still 119.5 MB. Free memory was 95.0 MB in the beginning and 93.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:37:24,871 INFO L168 Benchmark]: RCFGBuilder took 413.64 ms. Allocated memory is still 119.5 MB. Free memory was 93.4 MB in the beginning and 80.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:37:24,872 INFO L168 Benchmark]: TraceAbstraction took 7832.10 ms. Allocated memory was 119.5 MB in the beginning and 184.5 MB in the end (delta: 65.0 MB). Free memory was 80.4 MB in the beginning and 59.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 88.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:37:24,872 INFO L168 Benchmark]: Witness Printer took 75.76 ms. Allocated memory is still 184.5 MB. Free memory was 59.7 MB in the beginning and 56.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:37:24,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 43.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.80 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 57.4 MB in the beginning and 95.0 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.09 ms. Allocated memory is still 119.5 MB. Free memory was 95.0 MB in the beginning and 93.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 413.64 ms. Allocated memory is still 119.5 MB. Free memory was 93.4 MB in the beginning and 80.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7832.10 ms. Allocated memory was 119.5 MB in the beginning and 184.5 MB in the end (delta: 65.0 MB). Free memory was 80.4 MB in the beginning and 59.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 88.6 MB. Max. memory is 16.1 GB. * Witness Printer took 75.76 ms. Allocated memory is still 184.5 MB. Free memory was 59.7 MB in the beginning and 56.5 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 149]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 7.7s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2001 SDtfs, 2914 SDslu, 153 SDs, 0 SdLazy, 1413 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10249occurred in iteration=25, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 615 NumberOfCodeBlocks, 615 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 589 ConstructedInterpolants, 0 QuantifiedInterpolants, 1900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 23:37:24,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda5fddb-2795-44be-a013-e7b0c01f153d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...