./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_6.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_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0f4ea6e3bcbb2b79339dce82d9fa934022810e04d651b4bbb6fb3904b8f8c98 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 08:55:31,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:55:31,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:55:31,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:55:31,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:55:31,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:55:31,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:55:31,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:55:31,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:55:31,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:55:31,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:55:31,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:55:31,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:55:31,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:55:31,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:55:31,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:55:31,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:55:31,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:55:31,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:55:31,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:55:31,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:55:31,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:55:31,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:55:31,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:55:31,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:55:31,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:55:31,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:55:31,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:55:31,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:55:31,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:55:31,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:55:31,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:55:31,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:55:31,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:55:31,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:55:31,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:55:31,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:55:31,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:55:31,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:55:31,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:55:31,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:55:31,183 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:55:31,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:55:31,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:55:31,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:55:31,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:55:31,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:55:31,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:55:31,214 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:55:31,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:55:31,215 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:55:31,215 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:55:31,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:55:31,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:55:31,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:55:31,217 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:55:31,218 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:55:31,218 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:55:31,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:55:31,218 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:55:31,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:55:31,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:55:31,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:55:31,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:55:31,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:55:31,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:55:31,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:55:31,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:55:31,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:55:31,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:55:31,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:55:31,222 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_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0f4ea6e3bcbb2b79339dce82d9fa934022810e04d651b4bbb6fb3904b8f8c98 [2021-10-28 08:55:31,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:55:31,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:55:31,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:55:31,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:55:31,542 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:55:31,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/locks/test_locks_6.c [2021-10-28 08:55:31,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/data/6c8a19d96/172edd4ef95a4582b683ce3500ec6b13/FLAGc189241f8 [2021-10-28 08:55:32,171 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:55:32,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/sv-benchmarks/c/locks/test_locks_6.c [2021-10-28 08:55:32,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/data/6c8a19d96/172edd4ef95a4582b683ce3500ec6b13/FLAGc189241f8 [2021-10-28 08:55:32,517 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/data/6c8a19d96/172edd4ef95a4582b683ce3500ec6b13 [2021-10-28 08:55:32,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:55:32,524 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:55:32,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:55:32,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:55:32,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:55:32,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f70f315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32, skipping insertion in model container [2021-10-28 08:55:32,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:55:32,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:55:32,777 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_8377f202-68f7-48ac-a7d2-d68c9d12eb77/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-10-28 08:55:32,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:55:32,794 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:55:32,835 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_8377f202-68f7-48ac-a7d2-d68c9d12eb77/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-10-28 08:55:32,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:55:32,852 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:55:32,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32 WrapperNode [2021-10-28 08:55:32,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:55:32,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:55:32,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:55:32,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:55:32,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:55:32,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:55:32,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:55:32,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:55:32,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (1/1) ... [2021-10-28 08:55:32,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:55:32,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:55:32,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:55:32,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:55:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:55:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:55:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:55:33,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:55:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:55:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:55:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:55:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:55:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:55:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:55:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:55:33,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:55:33,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:55:33,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:55:33,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:55:33,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:55:33,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:55:33,333 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-28 08:55:33,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:55:33 BoogieIcfgContainer [2021-10-28 08:55:33,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:55:33,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:55:33,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:55:33,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:55:33,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:55:32" (1/3) ... [2021-10-28 08:55:33,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fb757d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:55:33, skipping insertion in model container [2021-10-28 08:55:33,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:32" (2/3) ... [2021-10-28 08:55:33,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fb757d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:55:33, skipping insertion in model container [2021-10-28 08:55:33,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:55:33" (3/3) ... [2021-10-28 08:55:33,363 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-10-28 08:55:33,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:55:33,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 08:55:33,441 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:55:33,461 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 08:55:33,461 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 08:55:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 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 08:55:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:55:33,488 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:33,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:33,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1067342593, now seen corresponding path program 1 times [2021-10-28 08:55:33,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:33,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980472904] [2021-10-28 08:55:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:33,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:33,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:55:33,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:33,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980472904] [2021-10-28 08:55:33,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980472904] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:33,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:33,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:55:33,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034940732] [2021-10-28 08:55:33,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:55:33,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:55:33,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:55:33,795 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 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 08:55:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:33,829 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2021-10-28 08:55:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:55:33,832 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 08:55:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:33,840 INFO L225 Difference]: With dead ends: 33 [2021-10-28 08:55:33,840 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 08:55:33,842 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 08:55:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 08:55:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 08:55:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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 08:55:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 45 transitions. [2021-10-28 08:55:33,874 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 45 transitions. Word has length 9 [2021-10-28 08:55:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:33,875 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 45 transitions. [2021-10-28 08:55:33,875 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 08:55:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 45 transitions. [2021-10-28 08:55:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:55:33,876 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:33,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:33,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:55:33,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1993066942, now seen corresponding path program 1 times [2021-10-28 08:55:33,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:33,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605575460] [2021-10-28 08:55:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:33,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:33,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:33,979 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 08:55:33,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:33,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605575460] [2021-10-28 08:55:33,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605575460] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:33,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:33,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:33,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064835795] [2021-10-28 08:55:33,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:33,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:33,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:33,984 INFO L87 Difference]: Start difference. First operand 28 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:34,137 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2021-10-28 08:55:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 08:55:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:34,142 INFO L225 Difference]: With dead ends: 49 [2021-10-28 08:55:34,143 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 08:55:34,144 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 08:55:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 08:55:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-10-28 08:55:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 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 08:55:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-10-28 08:55:34,157 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 17 [2021-10-28 08:55:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:34,158 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-10-28 08:55:34,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-10-28 08:55:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:55:34,161 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:34,161 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:34,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:55:34,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1313008572, now seen corresponding path program 1 times [2021-10-28 08:55:34,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:34,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026803148] [2021-10-28 08:55:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:34,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:34,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:34,345 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 08:55:34,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:34,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026803148] [2021-10-28 08:55:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026803148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:34,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:34,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:34,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931043086] [2021-10-28 08:55:34,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:34,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:34,349 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:34,461 INFO L93 Difference]: Finished difference Result 49 states and 79 transitions. [2021-10-28 08:55:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 08:55:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:34,463 INFO L225 Difference]: With dead ends: 49 [2021-10-28 08:55:34,463 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 08:55:34,464 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 08:55:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 08:55:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-10-28 08:55:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.744186046511628) internal successors, (75), 43 states have internal predecessors, (75), 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 08:55:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2021-10-28 08:55:34,470 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 17 [2021-10-28 08:55:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:34,471 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2021-10-28 08:55:34,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2021-10-28 08:55:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:55:34,472 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:34,472 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:34,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:55:34,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1655318379, now seen corresponding path program 1 times [2021-10-28 08:55:34,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:34,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808651560] [2021-10-28 08:55:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:34,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:34,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:34,549 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 08:55:34,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:34,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808651560] [2021-10-28 08:55:34,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808651560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:34,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:34,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:34,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371301082] [2021-10-28 08:55:34,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:34,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:34,552 INFO L87 Difference]: Start difference. First operand 47 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:34,678 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2021-10-28 08:55:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:34,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-28 08:55:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:34,683 INFO L225 Difference]: With dead ends: 52 [2021-10-28 08:55:34,684 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 08:55:34,685 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 08:55:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 08:55:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-10-28 08:55:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 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 08:55:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 80 transitions. [2021-10-28 08:55:34,704 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 80 transitions. Word has length 18 [2021-10-28 08:55:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:34,705 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 80 transitions. [2021-10-28 08:55:34,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 80 transitions. [2021-10-28 08:55:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:55:34,706 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:34,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:34,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:55:34,707 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2048345389, now seen corresponding path program 1 times [2021-10-28 08:55:34,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:34,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204473890] [2021-10-28 08:55:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:34,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:34,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:34,815 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 08:55:34,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:34,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204473890] [2021-10-28 08:55:34,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204473890] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:34,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:34,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:34,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541120858] [2021-10-28 08:55:34,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:34,819 INFO L87 Difference]: Start difference. First operand 50 states and 80 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:34,931 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2021-10-28 08:55:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-28 08:55:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:34,936 INFO L225 Difference]: With dead ends: 89 [2021-10-28 08:55:34,937 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 08:55:34,937 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 08:55:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 08:55:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-10-28 08:55:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.6626506024096386) internal successors, (138), 83 states have internal predecessors, (138), 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 08:55:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 141 transitions. [2021-10-28 08:55:34,962 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 141 transitions. Word has length 18 [2021-10-28 08:55:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:34,962 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 141 transitions. [2021-10-28 08:55:34,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 141 transitions. [2021-10-28 08:55:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:55:34,964 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:34,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:34,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:55:34,965 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1566563537, now seen corresponding path program 1 times [2021-10-28 08:55:34,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:34,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529439050] [2021-10-28 08:55:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:34,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,048 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 08:55:35,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:35,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529439050] [2021-10-28 08:55:35,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529439050] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:35,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:35,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:35,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906726273] [2021-10-28 08:55:35,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:35,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:35,055 INFO L87 Difference]: Start difference. First operand 87 states and 141 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:35,160 INFO L93 Difference]: Finished difference Result 109 states and 176 transitions. [2021-10-28 08:55:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:35,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-28 08:55:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:35,162 INFO L225 Difference]: With dead ends: 109 [2021-10-28 08:55:35,162 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 08:55:35,163 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 08:55:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 08:55:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-10-28 08:55:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.6385542168674698) internal successors, (136), 83 states have internal predecessors, (136), 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 08:55:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 139 transitions. [2021-10-28 08:55:35,176 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 139 transitions. Word has length 18 [2021-10-28 08:55:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:35,177 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 139 transitions. [2021-10-28 08:55:35,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 139 transitions. [2021-10-28 08:55:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 08:55:35,181 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:35,181 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:35,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:55:35,182 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:35,182 INFO L85 PathProgramCache]: Analyzing trace with hash 926017401, now seen corresponding path program 1 times [2021-10-28 08:55:35,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:35,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671584188] [2021-10-28 08:55:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:35,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,263 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 08:55:35,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:35,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671584188] [2021-10-28 08:55:35,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671584188] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:35,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:35,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:35,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987890255] [2021-10-28 08:55:35,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:35,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:35,266 INFO L87 Difference]: Start difference. First operand 87 states and 139 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:35,363 INFO L93 Difference]: Finished difference Result 153 states and 246 transitions. [2021-10-28 08:55:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:35,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 08:55:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:35,365 INFO L225 Difference]: With dead ends: 153 [2021-10-28 08:55:35,367 INFO L226 Difference]: Without dead ends: 153 [2021-10-28 08:55:35,367 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 08:55:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-28 08:55:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 119. [2021-10-28 08:55:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.617391304347826) internal successors, (186), 115 states have internal predecessors, (186), 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 08:55:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 189 transitions. [2021-10-28 08:55:35,376 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 189 transitions. Word has length 19 [2021-10-28 08:55:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:35,377 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 189 transitions. [2021-10-28 08:55:35,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 189 transitions. [2021-10-28 08:55:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 08:55:35,378 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:35,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:35,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:55:35,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1606075771, now seen corresponding path program 1 times [2021-10-28 08:55:35,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:35,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191416826] [2021-10-28 08:55:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:35,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,453 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 08:55:35,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:35,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191416826] [2021-10-28 08:55:35,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191416826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:35,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:35,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:35,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347977924] [2021-10-28 08:55:35,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:35,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:35,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:35,456 INFO L87 Difference]: Start difference. First operand 119 states and 189 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:35,548 INFO L93 Difference]: Finished difference Result 161 states and 248 transitions. [2021-10-28 08:55:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:35,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 08:55:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:35,550 INFO L225 Difference]: With dead ends: 161 [2021-10-28 08:55:35,551 INFO L226 Difference]: Without dead ends: 161 [2021-10-28 08:55:35,551 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 08:55:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-28 08:55:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-10-28 08:55:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 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 08:55:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 247 transitions. [2021-10-28 08:55:35,564 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 247 transitions. Word has length 19 [2021-10-28 08:55:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:35,564 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 247 transitions. [2021-10-28 08:55:35,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 247 transitions. [2021-10-28 08:55:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:55:35,566 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:35,566 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 08:55:35,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:55:35,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1358016280, now seen corresponding path program 1 times [2021-10-28 08:55:35,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:35,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285427504] [2021-10-28 08:55:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:35,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,622 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 08:55:35,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:35,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285427504] [2021-10-28 08:55:35,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285427504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:35,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:35,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:35,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727966204] [2021-10-28 08:55:35,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:35,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:35,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:35,624 INFO L87 Difference]: Start difference. First operand 159 states and 247 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 08:55:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:35,711 INFO L93 Difference]: Finished difference Result 167 states and 252 transitions. [2021-10-28 08:55:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:35,712 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 08:55:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:35,713 INFO L225 Difference]: With dead ends: 167 [2021-10-28 08:55:35,714 INFO L226 Difference]: Without dead ends: 167 [2021-10-28 08:55:35,715 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 08:55:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-28 08:55:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-10-28 08:55:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 161 states have (on average 1.5403726708074534) internal successors, (248), 161 states have internal predecessors, (248), 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 08:55:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2021-10-28 08:55:35,723 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 20 [2021-10-28 08:55:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:35,723 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2021-10-28 08:55:35,724 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 08:55:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2021-10-28 08:55:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:55:35,731 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:35,731 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 08:55:35,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:55:35,731 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:35,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1751043290, now seen corresponding path program 1 times [2021-10-28 08:55:35,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:35,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152581014] [2021-10-28 08:55:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:35,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,805 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 08:55:35,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:35,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152581014] [2021-10-28 08:55:35,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152581014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:35,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:35,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:35,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977551073] [2021-10-28 08:55:35,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:35,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:35,807 INFO L87 Difference]: Start difference. First operand 165 states and 251 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 08:55:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:35,898 INFO L93 Difference]: Finished difference Result 283 states and 428 transitions. [2021-10-28 08:55:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:35,898 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 08:55:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:35,900 INFO L225 Difference]: With dead ends: 283 [2021-10-28 08:55:35,900 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 08:55:35,901 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 08:55:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 08:55:35,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-10-28 08:55:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.502183406113537) internal successors, (344), 229 states have internal predecessors, (344), 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 08:55:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 347 transitions. [2021-10-28 08:55:35,909 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 347 transitions. Word has length 20 [2021-10-28 08:55:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:35,910 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 347 transitions. [2021-10-28 08:55:35,910 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 08:55:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 347 transitions. [2021-10-28 08:55:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:55:35,912 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:35,912 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 08:55:35,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 08:55:35,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:35,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1070984920, now seen corresponding path program 1 times [2021-10-28 08:55:35,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:35,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219697052] [2021-10-28 08:55:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:35,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:35,975 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 08:55:35,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:35,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219697052] [2021-10-28 08:55:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219697052] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:35,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:35,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:35,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21831388] [2021-10-28 08:55:35,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:35,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:35,980 INFO L87 Difference]: Start difference. First operand 233 states and 347 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 08:55:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:36,073 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2021-10-28 08:55:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:36,074 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 08:55:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:36,076 INFO L225 Difference]: With dead ends: 307 [2021-10-28 08:55:36,076 INFO L226 Difference]: Without dead ends: 307 [2021-10-28 08:55:36,076 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 08:55:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-28 08:55:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2021-10-28 08:55:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.4485049833887043) internal successors, (436), 301 states have internal predecessors, (436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 439 transitions. [2021-10-28 08:55:36,094 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 439 transitions. Word has length 20 [2021-10-28 08:55:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:36,095 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 439 transitions. [2021-10-28 08:55:36,095 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 08:55:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 439 transitions. [2021-10-28 08:55:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:55:36,096 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:36,096 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 08:55:36,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 08:55:36,096 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:36,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1552448560, now seen corresponding path program 1 times [2021-10-28 08:55:36,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:36,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985714409] [2021-10-28 08:55:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:36,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,173 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 08:55:36,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:36,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985714409] [2021-10-28 08:55:36,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985714409] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:36,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:36,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:36,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875323451] [2021-10-28 08:55:36,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:36,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:36,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:36,175 INFO L87 Difference]: Start difference. First operand 305 states and 439 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 08:55:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:36,247 INFO L93 Difference]: Finished difference Result 315 states and 440 transitions. [2021-10-28 08:55:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:36,248 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 08:55:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:36,250 INFO L225 Difference]: With dead ends: 315 [2021-10-28 08:55:36,250 INFO L226 Difference]: Without dead ends: 315 [2021-10-28 08:55:36,250 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 08:55:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-28 08:55:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2021-10-28 08:55:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 309 states have (on average 1.4110032362459546) internal successors, (436), 309 states have internal predecessors, (436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:55:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2021-10-28 08:55:36,260 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 21 [2021-10-28 08:55:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:36,260 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2021-10-28 08:55:36,260 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 08:55:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2021-10-28 08:55:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:55:36,261 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:36,262 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 08:55:36,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 08:55:36,262 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:36,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1159421550, now seen corresponding path program 1 times [2021-10-28 08:55:36,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:36,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322339064] [2021-10-28 08:55:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:36,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,356 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 08:55:36,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:36,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322339064] [2021-10-28 08:55:36,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322339064] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:36,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:36,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:36,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251529646] [2021-10-28 08:55:36,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:36,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:36,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:36,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:36,359 INFO L87 Difference]: Start difference. First operand 313 states and 439 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 08:55:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:36,444 INFO L93 Difference]: Finished difference Result 523 states and 720 transitions. [2021-10-28 08:55:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:36,445 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 08:55:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:36,448 INFO L225 Difference]: With dead ends: 523 [2021-10-28 08:55:36,449 INFO L226 Difference]: Without dead ends: 523 [2021-10-28 08:55:36,449 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 08:55:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-10-28 08:55:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2021-10-28 08:55:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.3686534216335542) internal successors, (620), 453 states have internal predecessors, (620), 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 08:55:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 623 transitions. [2021-10-28 08:55:36,465 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 623 transitions. Word has length 21 [2021-10-28 08:55:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:36,466 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 623 transitions. [2021-10-28 08:55:36,466 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 08:55:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 623 transitions. [2021-10-28 08:55:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:55:36,467 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:36,468 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 08:55:36,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 08:55:36,468 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1839479920, now seen corresponding path program 1 times [2021-10-28 08:55:36,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:36,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117994931] [2021-10-28 08:55:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:36,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,515 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 08:55:36,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:36,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117994931] [2021-10-28 08:55:36,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117994931] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:36,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:36,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:36,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345422737] [2021-10-28 08:55:36,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:36,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:36,517 INFO L87 Difference]: Start difference. First operand 457 states and 623 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 08:55:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:36,615 INFO L93 Difference]: Finished difference Result 587 states and 760 transitions. [2021-10-28 08:55:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:36,616 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 08:55:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:36,620 INFO L225 Difference]: With dead ends: 587 [2021-10-28 08:55:36,620 INFO L226 Difference]: Without dead ends: 587 [2021-10-28 08:55:36,621 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 08:55:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-10-28 08:55:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2021-10-28 08:55:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 581 states have (on average 1.3012048192771084) internal successors, (756), 581 states have internal predecessors, (756), 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 08:55:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2021-10-28 08:55:36,644 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 21 [2021-10-28 08:55:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:36,644 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2021-10-28 08:55:36,644 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 08:55:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2021-10-28 08:55:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:55:36,646 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:36,646 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 08:55:36,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 08:55:36,647 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:36,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1582545725, now seen corresponding path program 1 times [2021-10-28 08:55:36,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:36,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610201653] [2021-10-28 08:55:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:36,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,690 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 08:55:36,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:36,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610201653] [2021-10-28 08:55:36,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610201653] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:36,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:36,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:36,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196663684] [2021-10-28 08:55:36,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:36,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:36,693 INFO L87 Difference]: Start difference. First operand 585 states and 759 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 08:55:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:36,764 INFO L93 Difference]: Finished difference Result 603 states and 760 transitions. [2021-10-28 08:55:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:36,765 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 08:55:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:36,768 INFO L225 Difference]: With dead ends: 603 [2021-10-28 08:55:36,769 INFO L226 Difference]: Without dead ends: 603 [2021-10-28 08:55:36,769 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 08:55:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-10-28 08:55:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-10-28 08:55:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.2663316582914572) internal successors, (756), 597 states have internal predecessors, (756), 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 08:55:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 759 transitions. [2021-10-28 08:55:36,785 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 759 transitions. Word has length 22 [2021-10-28 08:55:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:36,786 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 759 transitions. [2021-10-28 08:55:36,786 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 08:55:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 759 transitions. [2021-10-28 08:55:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:55:36,788 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:36,788 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] [2021-10-28 08:55:36,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 08:55:36,788 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:36,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1189518715, now seen corresponding path program 1 times [2021-10-28 08:55:36,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:36,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113418486] [2021-10-28 08:55:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:36,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,828 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 08:55:36,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:36,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113418486] [2021-10-28 08:55:36,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113418486] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:36,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:36,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:36,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783473962] [2021-10-28 08:55:36,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:36,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:36,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:36,831 INFO L87 Difference]: Start difference. First operand 601 states and 759 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 08:55:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:36,903 INFO L93 Difference]: Finished difference Result 969 states and 1175 transitions. [2021-10-28 08:55:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:36,904 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 08:55:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:36,909 INFO L225 Difference]: With dead ends: 969 [2021-10-28 08:55:36,910 INFO L226 Difference]: Without dead ends: 969 [2021-10-28 08:55:36,910 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 08:55:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-10-28 08:55:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 905. [2021-10-28 08:55:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.2297447280799112) internal successors, (1108), 901 states have internal predecessors, (1108), 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 08:55:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1111 transitions. [2021-10-28 08:55:36,937 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1111 transitions. Word has length 22 [2021-10-28 08:55:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:36,937 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1111 transitions. [2021-10-28 08:55:36,938 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 08:55:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1111 transitions. [2021-10-28 08:55:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:55:36,940 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:55:36,940 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 08:55:36,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 08:55:36,940 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-28 08:55:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:55:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1869577085, now seen corresponding path program 1 times [2021-10-28 08:55:36,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:55:36,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087526419] [2021-10-28 08:55:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:55:36,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:55:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:55:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:55:36,979 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 08:55:36,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:55:36,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087526419] [2021-10-28 08:55:36,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087526419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:55:36,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:55:36,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:55:36,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222935955] [2021-10-28 08:55:36,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:55:36,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:55:36,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:55:36,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:55:36,982 INFO L87 Difference]: Start difference. First operand 905 states and 1111 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 08:55:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:55:37,062 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2021-10-28 08:55:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:55:37,063 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 08:55:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:55:37,064 INFO L225 Difference]: With dead ends: 1127 [2021-10-28 08:55:37,064 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:55:37,064 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 08:55:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:55:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:55:37,065 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 08:55:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:55:37,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-10-28 08:55:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:55:37,065 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:55:37,066 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 08:55:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:55:37,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:55:37,068 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 08:55:37,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:55:37,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 08:55:37,073 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:55:37,074 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:55:37,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:55:37 BoogieIcfgContainer [2021-10-28 08:55:37,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:55:37,077 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:55:37,077 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:55:37,078 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:55:37,078 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:55:33" (3/4) ... [2021-10-28 08:55:37,081 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:55:37,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 08:55:37,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 08:55:37,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 08:55:37,092 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-28 08:55:37,093 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:55:37,093 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 08:55:37,093 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:55:37,130 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:55:37,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:55:37,132 INFO L168 Benchmark]: Toolchain (without parser) took 4607.20 ms. Allocated memory was 172.0 MB in the beginning and 207.6 MB in the end (delta: 35.7 MB). Free memory was 140.8 MB in the beginning and 95.8 MB in the end (delta: 45.1 MB). Peak memory consumption was 79.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:55:37,132 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:55:37,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.14 ms. Allocated memory is still 172.0 MB. Free memory was 140.4 MB in the beginning and 147.2 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:55:37,133 INFO L168 Benchmark]: Boogie Preprocessor took 56.48 ms. Allocated memory is still 172.0 MB. Free memory was 147.2 MB in the beginning and 145.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:55:37,134 INFO L168 Benchmark]: RCFGBuilder took 424.29 ms. Allocated memory is still 172.0 MB. Free memory was 145.3 MB in the beginning and 133.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:55:37,134 INFO L168 Benchmark]: TraceAbstraction took 3739.98 ms. Allocated memory was 172.0 MB in the beginning and 207.6 MB in the end (delta: 35.7 MB). Free memory was 133.3 MB in the beginning and 98.9 MB in the end (delta: 34.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:55:37,134 INFO L168 Benchmark]: Witness Printer took 52.99 ms. Allocated memory is still 207.6 MB. Free memory was 98.9 MB in the beginning and 95.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:55:37,136 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.14 ms. Allocated memory is still 172.0 MB. Free memory was 140.4 MB in the beginning and 147.2 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.48 ms. Allocated memory is still 172.0 MB. Free memory was 147.2 MB in the beginning and 145.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 424.29 ms. Allocated memory is still 172.0 MB. Free memory was 145.3 MB in the beginning and 133.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3739.98 ms. Allocated memory was 172.0 MB in the beginning and 207.6 MB in the end (delta: 35.7 MB). Free memory was 133.3 MB in the beginning and 98.9 MB in the end (delta: 34.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. * Witness Printer took 52.99 ms. Allocated memory is still 207.6 MB. Free memory was 98.9 MB in the beginning and 95.8 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: 107]: 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, 37 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 918 SDtfs, 1261 SDslu, 99 SDs, 0 SdLazy, 642 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=905occurred in iteration=16, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 1045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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 08:55:37,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8377f202-68f7-48ac-a7d2-d68c9d12eb77/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...