./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0f4ea6e3bcbb2b79339dce82d9fa934022810e04d651b4bbb6fb3904b8f8c98 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:00:05,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:00:05,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:00:05,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:00:05,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:00:05,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:00:05,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:00:05,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:00:05,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:00:05,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:00:05,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:00:05,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:00:05,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:00:05,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:00:05,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:00:05,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:00:05,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:00:05,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:00:05,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:00:05,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:00:05,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:00:05,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:00:05,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:00:05,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:00:05,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:00:05,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:00:05,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:00:05,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:00:05,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:00:05,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:00:05,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:00:05,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:00:05,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:00:05,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:00:05,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:00:05,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:00:05,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:00:05,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:00:05,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:00:05,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:00:05,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:00:05,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:00:05,259 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:00:05,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:00:05,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:00:05,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:00:05,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:00:05,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:00:05,269 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:00:05,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:00:05,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:00:05,270 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:00:05,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:00:05,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:00:05,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:00:05,272 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:00:05,272 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:00:05,272 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:00:05,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:00:05,273 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:00:05,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:00:05,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:00:05,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:00:05,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:00:05,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:00:05,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:00:05,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:00:05,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:00:05,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:00:05,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:00:05,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:00:05,278 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_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0f4ea6e3bcbb2b79339dce82d9fa934022810e04d651b4bbb6fb3904b8f8c98 [2021-10-21 20:00:05,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:00:05,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:00:05,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:00:05,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:00:05,671 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:00:05,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/locks/test_locks_6.c [2021-10-21 20:00:05,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/data/a289cd675/11e326372f96406d97a540ed5dc7bd49/FLAG83b45cc0b [2021-10-21 20:00:06,396 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:00:06,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/sv-benchmarks/c/locks/test_locks_6.c [2021-10-21 20:00:06,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/data/a289cd675/11e326372f96406d97a540ed5dc7bd49/FLAG83b45cc0b [2021-10-21 20:00:06,749 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/data/a289cd675/11e326372f96406d97a540ed5dc7bd49 [2021-10-21 20:00:06,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:00:06,758 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:00:06,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:00:06,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:00:06,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:00:06,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:00:06" (1/1) ... [2021-10-21 20:00:06,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af04f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:06, skipping insertion in model container [2021-10-21 20:00:06,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:00:06" (1/1) ... [2021-10-21 20:00:06,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:00:06,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:00:07,036 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_31da2b5c-dea5-4fe8-8cd0-74f172874647/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-10-21 20:00:07,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:00:07,072 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:00:07,097 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_31da2b5c-dea5-4fe8-8cd0-74f172874647/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-10-21 20:00:07,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:00:07,114 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:00:07,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07 WrapperNode [2021-10-21 20:00:07,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:00:07,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:00:07,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:00:07,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:00:07,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:00:07,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:00:07,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:00:07,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:00:07,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (1/1) ... [2021-10-21 20:00:07,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:00:07,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:00:07,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:00:07,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:00:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:00:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:00:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 20:00:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:00:07,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:00:07,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 20:00:07,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 20:00:07,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:00:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:00:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:00:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:00:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:00:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:00:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:00:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:00:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:00:07,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:00:07,632 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-21 20:00:07,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:00:07 BoogieIcfgContainer [2021-10-21 20:00:07,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:00:07,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:00:07,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:00:07,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:00:07,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:00:06" (1/3) ... [2021-10-21 20:00:07,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd49725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:00:07, skipping insertion in model container [2021-10-21 20:00:07,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:00:07" (2/3) ... [2021-10-21 20:00:07,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd49725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:00:07, skipping insertion in model container [2021-10-21 20:00:07,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:00:07" (3/3) ... [2021-10-21 20:00:07,660 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-10-21 20:00:07,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:00:07,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 20:00:07,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:00:07,762 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:00:07,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 20:00:07,795 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) [2021-10-21 20:00:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:00:07,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:07,804 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:07,804 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:07,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1067342593, now seen corresponding path program 1 times [2021-10-21 20:00:07,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:07,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106785031] [2021-10-21 20:00:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:07,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:08,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:08,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:08,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106785031] [2021-10-21 20:00:08,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106785031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:08,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:08,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:00:08,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868489223] [2021-10-21 20:00:08,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:00:08,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:00:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:00:08,271 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) [2021-10-21 20:00:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:08,332 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2021-10-21 20:00:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:00:08,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-21 20:00:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:08,345 INFO L225 Difference]: With dead ends: 33 [2021-10-21 20:00:08,346 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 20:00:08,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:00:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 20:00:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 20:00:08,394 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) [2021-10-21 20:00:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 45 transitions. [2021-10-21 20:00:08,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 45 transitions. Word has length 9 [2021-10-21 20:00:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:08,400 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 45 transitions. [2021-10-21 20:00:08,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 45 transitions. [2021-10-21 20:00:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:00:08,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:08,403 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:08,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:00:08,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1993066942, now seen corresponding path program 1 times [2021-10-21 20:00:08,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:08,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454388332] [2021-10-21 20:00:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:08,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:08,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:08,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:08,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454388332] [2021-10-21 20:00:08,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454388332] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:08,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:08,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628299369] [2021-10-21 20:00:08,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:08,553 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) [2021-10-21 20:00:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:08,710 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2021-10-21 20:00:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:08,711 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 [2021-10-21 20:00:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:08,713 INFO L225 Difference]: With dead ends: 49 [2021-10-21 20:00:08,733 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 20:00:08,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 20:00:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-10-21 20:00:08,741 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) [2021-10-21 20:00:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-10-21 20:00:08,745 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 17 [2021-10-21 20:00:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:08,746 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-10-21 20:00:08,747 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) [2021-10-21 20:00:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-10-21 20:00:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:00:08,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:08,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:08,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:00:08,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1313008572, now seen corresponding path program 1 times [2021-10-21 20:00:08,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:08,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218188007] [2021-10-21 20:00:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:08,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:08,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:08,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:08,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218188007] [2021-10-21 20:00:08,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218188007] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:08,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:08,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:08,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096519406] [2021-10-21 20:00:08,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:08,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:08,978 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) [2021-10-21 20:00:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:09,212 INFO L93 Difference]: Finished difference Result 49 states and 79 transitions. [2021-10-21 20:00:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:09,213 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 [2021-10-21 20:00:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:09,215 INFO L225 Difference]: With dead ends: 49 [2021-10-21 20:00:09,217 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 20:00:09,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 20:00:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-10-21 20:00:09,227 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) [2021-10-21 20:00:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2021-10-21 20:00:09,231 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 17 [2021-10-21 20:00:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:09,232 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2021-10-21 20:00:09,232 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) [2021-10-21 20:00:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2021-10-21 20:00:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:00:09,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:09,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:09,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:00:09,234 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1655318379, now seen corresponding path program 1 times [2021-10-21 20:00:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:09,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797719899] [2021-10-21 20:00:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:09,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:09,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:09,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:09,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797719899] [2021-10-21 20:00:09,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797719899] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:09,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:09,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:09,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908987787] [2021-10-21 20:00:09,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:09,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:09,399 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) [2021-10-21 20:00:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:09,553 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2021-10-21 20:00:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 20:00:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:09,558 INFO L225 Difference]: With dead ends: 52 [2021-10-21 20:00:09,558 INFO L226 Difference]: Without dead ends: 52 [2021-10-21 20:00:09,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-21 20:00:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-10-21 20:00:09,576 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) [2021-10-21 20:00:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 80 transitions. [2021-10-21 20:00:09,580 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 80 transitions. Word has length 18 [2021-10-21 20:00:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:09,580 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 80 transitions. [2021-10-21 20:00:09,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 80 transitions. [2021-10-21 20:00:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:00:09,582 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:09,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:09,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:00:09,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2048345389, now seen corresponding path program 1 times [2021-10-21 20:00:09,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:09,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605981782] [2021-10-21 20:00:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:09,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:09,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:09,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:09,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605981782] [2021-10-21 20:00:09,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605981782] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:09,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:09,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:09,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724138228] [2021-10-21 20:00:09,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:09,711 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) [2021-10-21 20:00:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:09,851 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2021-10-21 20:00:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 20:00:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:09,856 INFO L225 Difference]: With dead ends: 89 [2021-10-21 20:00:09,856 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 20:00:09,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 20:00:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-10-21 20:00:09,878 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) [2021-10-21 20:00:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 141 transitions. [2021-10-21 20:00:09,882 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 141 transitions. Word has length 18 [2021-10-21 20:00:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:09,883 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 141 transitions. [2021-10-21 20:00:09,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 141 transitions. [2021-10-21 20:00:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:00:09,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:09,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:09,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:00:09,886 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1566563537, now seen corresponding path program 1 times [2021-10-21 20:00:09,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:09,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556644872] [2021-10-21 20:00:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:09,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:09,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:09,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:09,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556644872] [2021-10-21 20:00:09,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556644872] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:09,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:09,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:09,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720562398] [2021-10-21 20:00:09,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:09,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:09,986 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) [2021-10-21 20:00:10,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:10,102 INFO L93 Difference]: Finished difference Result 109 states and 176 transitions. [2021-10-21 20:00:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:10,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 20:00:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:10,104 INFO L225 Difference]: With dead ends: 109 [2021-10-21 20:00:10,104 INFO L226 Difference]: Without dead ends: 109 [2021-10-21 20:00:10,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-21 20:00:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-10-21 20:00:10,118 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) [2021-10-21 20:00:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 139 transitions. [2021-10-21 20:00:10,120 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 139 transitions. Word has length 18 [2021-10-21 20:00:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:10,120 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 139 transitions. [2021-10-21 20:00:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 139 transitions. [2021-10-21 20:00:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:00:10,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:10,125 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:10,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:00:10,125 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash 926017401, now seen corresponding path program 1 times [2021-10-21 20:00:10,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:10,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483132782] [2021-10-21 20:00:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:10,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:10,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:10,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483132782] [2021-10-21 20:00:10,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483132782] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:10,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:10,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:10,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510454596] [2021-10-21 20:00:10,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:10,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:10,230 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) [2021-10-21 20:00:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:10,350 INFO L93 Difference]: Finished difference Result 153 states and 246 transitions. [2021-10-21 20:00:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 20:00:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:10,352 INFO L225 Difference]: With dead ends: 153 [2021-10-21 20:00:10,352 INFO L226 Difference]: Without dead ends: 153 [2021-10-21 20:00:10,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-21 20:00:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 119. [2021-10-21 20:00:10,370 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) [2021-10-21 20:00:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 189 transitions. [2021-10-21 20:00:10,376 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 189 transitions. Word has length 19 [2021-10-21 20:00:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:10,377 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 189 transitions. [2021-10-21 20:00:10,377 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) [2021-10-21 20:00:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 189 transitions. [2021-10-21 20:00:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:00:10,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:10,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:10,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:00:10,381 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1606075771, now seen corresponding path program 1 times [2021-10-21 20:00:10,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:10,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176201141] [2021-10-21 20:00:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:10,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:10,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:10,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176201141] [2021-10-21 20:00:10,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176201141] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:10,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:10,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:10,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495964401] [2021-10-21 20:00:10,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:10,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:10,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:10,474 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) [2021-10-21 20:00:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:10,568 INFO L93 Difference]: Finished difference Result 161 states and 248 transitions. [2021-10-21 20:00:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 20:00:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:10,571 INFO L225 Difference]: With dead ends: 161 [2021-10-21 20:00:10,571 INFO L226 Difference]: Without dead ends: 161 [2021-10-21 20:00:10,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-21 20:00:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-10-21 20:00:10,578 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) [2021-10-21 20:00:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 247 transitions. [2021-10-21 20:00:10,581 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 247 transitions. Word has length 19 [2021-10-21 20:00:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:10,583 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 247 transitions. [2021-10-21 20:00:10,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 247 transitions. [2021-10-21 20:00:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:00:10,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:10,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:10,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:00:10,589 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1358016280, now seen corresponding path program 1 times [2021-10-21 20:00:10,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:10,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123739360] [2021-10-21 20:00:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:10,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:10,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:10,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123739360] [2021-10-21 20:00:10,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123739360] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:10,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:10,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:10,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586787187] [2021-10-21 20:00:10,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:10,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:10,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:10,671 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) [2021-10-21 20:00:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:10,774 INFO L93 Difference]: Finished difference Result 167 states and 252 transitions. [2021-10-21 20:00:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:10,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 20:00:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:10,776 INFO L225 Difference]: With dead ends: 167 [2021-10-21 20:00:10,776 INFO L226 Difference]: Without dead ends: 167 [2021-10-21 20:00:10,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-21 20:00:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-10-21 20:00:10,781 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) [2021-10-21 20:00:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2021-10-21 20:00:10,783 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 20 [2021-10-21 20:00:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:10,783 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2021-10-21 20:00:10,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2021-10-21 20:00:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:00:10,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:10,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:00:10,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1751043290, now seen corresponding path program 1 times [2021-10-21 20:00:10,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:10,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716858371] [2021-10-21 20:00:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:10,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:10,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:10,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716858371] [2021-10-21 20:00:10,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716858371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:10,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:10,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:10,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108512011] [2021-10-21 20:00:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:10,834 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) [2021-10-21 20:00:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:10,937 INFO L93 Difference]: Finished difference Result 283 states and 428 transitions. [2021-10-21 20:00:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:10,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 20:00:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:10,940 INFO L225 Difference]: With dead ends: 283 [2021-10-21 20:00:10,940 INFO L226 Difference]: Without dead ends: 283 [2021-10-21 20:00:10,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-21 20:00:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-10-21 20:00:10,947 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) [2021-10-21 20:00:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 347 transitions. [2021-10-21 20:00:10,949 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 347 transitions. Word has length 20 [2021-10-21 20:00:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:10,949 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 347 transitions. [2021-10-21 20:00:10,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 347 transitions. [2021-10-21 20:00:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:00:10,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:10,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:10,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:00:10,951 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1070984920, now seen corresponding path program 1 times [2021-10-21 20:00:10,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:10,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475337582] [2021-10-21 20:00:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:10,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:10,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:10,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475337582] [2021-10-21 20:00:10,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475337582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:10,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:10,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:10,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532564289] [2021-10-21 20:00:10,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:10,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:11,000 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) [2021-10-21 20:00:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,085 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2021-10-21 20:00:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 20:00:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,087 INFO L225 Difference]: With dead ends: 307 [2021-10-21 20:00:11,088 INFO L226 Difference]: Without dead ends: 307 [2021-10-21 20:00:11,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-21 20:00:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2021-10-21 20:00:11,095 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) [2021-10-21 20:00:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 439 transitions. [2021-10-21 20:00:11,097 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 439 transitions. Word has length 20 [2021-10-21 20:00:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,097 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 439 transitions. [2021-10-21 20:00:11,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 439 transitions. [2021-10-21 20:00:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:00:11,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,098 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 20:00:11,099 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1552448560, now seen corresponding path program 1 times [2021-10-21 20:00:11,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802462225] [2021-10-21 20:00:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:11,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:11,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802462225] [2021-10-21 20:00:11,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802462225] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:11,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:11,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:11,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053812845] [2021-10-21 20:00:11,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:11,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:11,164 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) [2021-10-21 20:00:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,254 INFO L93 Difference]: Finished difference Result 315 states and 440 transitions. [2021-10-21 20:00:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:11,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:00:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,257 INFO L225 Difference]: With dead ends: 315 [2021-10-21 20:00:11,257 INFO L226 Difference]: Without dead ends: 315 [2021-10-21 20:00:11,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-21 20:00:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2021-10-21 20:00:11,264 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) [2021-10-21 20:00:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2021-10-21 20:00:11,266 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 21 [2021-10-21 20:00:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,266 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2021-10-21 20:00:11,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2021-10-21 20:00:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:00:11,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,267 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:00:11,268 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1159421550, now seen corresponding path program 1 times [2021-10-21 20:00:11,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132108711] [2021-10-21 20:00:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:11,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:11,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132108711] [2021-10-21 20:00:11,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132108711] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:11,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:11,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:11,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184295344] [2021-10-21 20:00:11,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:11,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:11,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:11,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:11,336 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) [2021-10-21 20:00:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,424 INFO L93 Difference]: Finished difference Result 523 states and 720 transitions. [2021-10-21 20:00:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:00:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,429 INFO L225 Difference]: With dead ends: 523 [2021-10-21 20:00:11,429 INFO L226 Difference]: Without dead ends: 523 [2021-10-21 20:00:11,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-10-21 20:00:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2021-10-21 20:00:11,442 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) [2021-10-21 20:00:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 623 transitions. [2021-10-21 20:00:11,445 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 623 transitions. Word has length 21 [2021-10-21 20:00:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,446 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 623 transitions. [2021-10-21 20:00:11,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 623 transitions. [2021-10-21 20:00:11,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:00:11,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,448 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 20:00:11,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:11,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1839479920, now seen corresponding path program 1 times [2021-10-21 20:00:11,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540789015] [2021-10-21 20:00:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:11,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:11,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540789015] [2021-10-21 20:00:11,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540789015] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:11,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:11,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:11,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063246840] [2021-10-21 20:00:11,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:11,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:11,506 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) [2021-10-21 20:00:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,609 INFO L93 Difference]: Finished difference Result 587 states and 760 transitions. [2021-10-21 20:00:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:00:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,614 INFO L225 Difference]: With dead ends: 587 [2021-10-21 20:00:11,614 INFO L226 Difference]: Without dead ends: 587 [2021-10-21 20:00:11,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-10-21 20:00:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2021-10-21 20:00:11,628 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) [2021-10-21 20:00:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2021-10-21 20:00:11,631 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 21 [2021-10-21 20:00:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,632 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2021-10-21 20:00:11,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2021-10-21 20:00:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:00:11,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 20:00:11,634 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1582545725, now seen corresponding path program 1 times [2021-10-21 20:00:11,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489179712] [2021-10-21 20:00:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:11,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:11,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489179712] [2021-10-21 20:00:11,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489179712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:11,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:11,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:11,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016449969] [2021-10-21 20:00:11,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:11,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:11,698 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) [2021-10-21 20:00:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,783 INFO L93 Difference]: Finished difference Result 603 states and 760 transitions. [2021-10-21 20:00:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 20:00:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,791 INFO L225 Difference]: With dead ends: 603 [2021-10-21 20:00:11,792 INFO L226 Difference]: Without dead ends: 603 [2021-10-21 20:00:11,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-10-21 20:00:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-10-21 20:00:11,805 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) [2021-10-21 20:00:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 759 transitions. [2021-10-21 20:00:11,808 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 759 transitions. Word has length 22 [2021-10-21 20:00:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,809 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 759 transitions. [2021-10-21 20:00:11,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 759 transitions. [2021-10-21 20:00:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:00:11,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,810 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 20:00:11,811 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1189518715, now seen corresponding path program 1 times [2021-10-21 20:00:11,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456112753] [2021-10-21 20:00:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:11,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:11,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456112753] [2021-10-21 20:00:11,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456112753] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:11,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:11,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:11,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208195760] [2021-10-21 20:00:11,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:11,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:11,854 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) [2021-10-21 20:00:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,950 INFO L93 Difference]: Finished difference Result 969 states and 1175 transitions. [2021-10-21 20:00:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:11,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 20:00:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,956 INFO L225 Difference]: With dead ends: 969 [2021-10-21 20:00:11,956 INFO L226 Difference]: Without dead ends: 969 [2021-10-21 20:00:11,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-10-21 20:00:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 905. [2021-10-21 20:00:11,980 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) [2021-10-21 20:00:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1111 transitions. [2021-10-21 20:00:11,985 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1111 transitions. Word has length 22 [2021-10-21 20:00:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,985 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1111 transitions. [2021-10-21 20:00:11,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1111 transitions. [2021-10-21 20:00:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:00:11,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 20:00:11,988 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-10-21 20:00:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1869577085, now seen corresponding path program 1 times [2021-10-21 20:00:11,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978906482] [2021-10-21 20:00:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:00:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:12,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:12,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978906482] [2021-10-21 20:00:12,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978906482] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:12,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:12,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:12,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131449667] [2021-10-21 20:00:12,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:12,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:12,042 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) [2021-10-21 20:00:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:12,125 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2021-10-21 20:00:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 20:00:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:12,126 INFO L225 Difference]: With dead ends: 1127 [2021-10-21 20:00:12,126 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:00:12,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:00:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:00:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:00:12,128 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-10-21 20:00:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:12,128 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:00:12,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:00:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:00:12,129 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:00:12,132 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 20:00:12,132 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:00:12,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 20:00:12,138 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:00:12,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:00:12 BoogieIcfgContainer [2021-10-21 20:00:12,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:00:12,141 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:00:12,141 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:00:12,142 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:00:12,142 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:00:07" (3/4) ... [2021-10-21 20:00:12,145 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:00:12,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 20:00:12,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 20:00:12,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 20:00:12,159 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-21 20:00:12,159 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:00:12,159 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 20:00:12,160 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:00:12,199 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:00:12,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:00:12,202 INFO L168 Benchmark]: Toolchain (without parser) took 5443.15 ms. Allocated memory was 119.5 MB in the beginning and 157.3 MB in the end (delta: 37.7 MB). Free memory was 79.6 MB in the beginning and 77.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 39.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:00:12,202 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 95.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:00:12,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.06 ms. Allocated memory is still 119.5 MB. Free memory was 79.4 MB in the beginning and 93.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:00:12,203 INFO L168 Benchmark]: Boogie Preprocessor took 43.92 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:00:12,204 INFO L168 Benchmark]: RCFGBuilder took 473.50 ms. Allocated memory is still 119.5 MB. Free memory was 92.2 MB in the beginning and 80.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:00:12,204 INFO L168 Benchmark]: TraceAbstraction took 4503.93 ms. Allocated memory was 119.5 MB in the beginning and 157.3 MB in the end (delta: 37.7 MB). Free memory was 80.2 MB in the beginning and 80.8 MB in the end (delta: -660.1 kB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:00:12,205 INFO L168 Benchmark]: Witness Printer took 58.79 ms. Allocated memory is still 157.3 MB. Free memory was 80.8 MB in the beginning and 77.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:00:12,207 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 95.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.06 ms. Allocated memory is still 119.5 MB. Free memory was 79.4 MB in the beginning and 93.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.92 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 473.50 ms. Allocated memory is still 119.5 MB. Free memory was 92.2 MB in the beginning and 80.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4503.93 ms. Allocated memory was 119.5 MB in the beginning and 157.3 MB in the end (delta: 37.7 MB). Free memory was 80.2 MB in the beginning and 80.8 MB in the end (delta: -660.1 kB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. * Witness Printer took 58.79 ms. Allocated memory is still 157.3 MB. Free memory was 80.8 MB in the beginning and 77.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 4396.7ms, OverallIterations: 17, TraceHistogramMax: 1, EmptinessCheckTime: 58.5ms, AutomataDifference: 2065.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 918 SDtfs, 1261 SDslu, 99 SDs, 0 SdLazy, 642 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1060.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 833.5ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 253.5ms AutomataMinimizationTime, 17 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.4ms SsaConstructionTime, 313.3ms SatisfiabilityAnalysisTime, 1231.6ms 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! [2021-10-21 20:00:12,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31da2b5c-dea5-4fe8-8cd0-74f172874647/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...