./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/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_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/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 64bit --witnessprinter.graph.data.programhash cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:30:02,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:30:02,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:30:02,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:30:02,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:30:02,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:30:02,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:30:02,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:30:02,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:30:02,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:30:02,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:30:02,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:30:02,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:30:02,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:30:02,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:30:02,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:30:02,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:30:02,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:30:02,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:30:02,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:30:02,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:30:02,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:30:02,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:30:02,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:30:02,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:30:02,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:30:02,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:30:02,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:30:02,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:30:02,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:30:02,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:30:02,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:30:02,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:30:02,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:30:02,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:30:02,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:30:02,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:30:02,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:30:02,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:30:02,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:30:02,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:30:02,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-10-21 20:30:02,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:30:02,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:30:02,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:30:02,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:30:02,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:30:02,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:30:02,225 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:30:02,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:30:02,226 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:30:02,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:30:02,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:30:02,227 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:30:02,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:30:02,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:30:02,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:30:02,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:30:02,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:30:02,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:30:02,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:30:02,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:30:02,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:30:02,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:30:02,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:30:02,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:30:02,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:30:02,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:30:02,231 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_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf [2021-10-21 20:30:02,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:30:02,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:30:02,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:30:02,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:30:02,516 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:30:02,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2021-10-21 20:30:02,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/data/63713d790/0ad2ff1183ca4305b31577b36b8effeb/FLAG765ff3db0 [2021-10-21 20:30:03,056 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:30:03,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2021-10-21 20:30:03,069 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/data/63713d790/0ad2ff1183ca4305b31577b36b8effeb/FLAG765ff3db0 [2021-10-21 20:30:03,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/data/63713d790/0ad2ff1183ca4305b31577b36b8effeb [2021-10-21 20:30:03,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:30:03,432 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:30:03,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:30:03,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:30:03,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:30:03,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d795b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03, skipping insertion in model container [2021-10-21 20:30:03,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:30:03,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:30:03,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:30:03,678 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:30:03,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:30:03,712 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:30:03,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03 WrapperNode [2021-10-21 20:30:03,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:30:03,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:30:03,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:30:03,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:30:03,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:30:03,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:30:03,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:30:03,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:30:03,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (1/1) ... [2021-10-21 20:30:03,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:30:03,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:30:03,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:30:03,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:30:03,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:30:03,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:30:03,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:30:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:30:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:30:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:30:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:30:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:30:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:30:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:30:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:30:04,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:30:04,085 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 20:30:04,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:30:04 BoogieIcfgContainer [2021-10-21 20:30:04,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:30:04,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:30:04,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:30:04,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:30:04,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:30:03" (1/3) ... [2021-10-21 20:30:04,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214c5f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:30:04, skipping insertion in model container [2021-10-21 20:30:04,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:30:03" (2/3) ... [2021-10-21 20:30:04,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214c5f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:30:04, skipping insertion in model container [2021-10-21 20:30:04,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:30:04" (3/3) ... [2021-10-21 20:30:04,107 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays01-EquivalentConstantIndices-1.c [2021-10-21 20:30:04,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:30:04,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-21 20:30:04,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:30:04,170 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 20:30:04,170 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-21 20:30:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 20:30:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 20:30:04,194 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:04,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:04,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1425323941, now seen corresponding path program 1 times [2021-10-21 20:30:04,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:04,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495713932] [2021-10-21 20:30:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:04,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:04,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:04,371 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 20:30:04,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:04,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495713932] [2021-10-21 20:30:04,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495713932] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:30:04,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:30:04,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:30:04,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536187219] [2021-10-21 20:30:04,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:30:04,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:30:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:30:04,398 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:04,474 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-21 20:30:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:30:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 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 8 [2021-10-21 20:30:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:04,491 INFO L225 Difference]: With dead ends: 29 [2021-10-21 20:30:04,491 INFO L226 Difference]: Without dead ends: 26 [2021-10-21 20:30:04,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:30:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-21 20:30:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-21 20:30:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 22 states have internal predecessors, (24), 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 20:30:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-21 20:30:04,561 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 8 [2021-10-21 20:30:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:04,562 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-21 20:30:04,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-21 20:30:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 20:30:04,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:04,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:04,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:30:04,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1425324251, now seen corresponding path program 1 times [2021-10-21 20:30:04,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:04,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52652020] [2021-10-21 20:30:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:04,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:04,671 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 20:30:04,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:04,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52652020] [2021-10-21 20:30:04,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52652020] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:30:04,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:30:04,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:30:04,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152274909] [2021-10-21 20:30:04,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:30:04,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:30:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:30:04,676 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:04,788 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-21 20:30:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:30:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 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 8 [2021-10-21 20:30:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:04,790 INFO L225 Difference]: With dead ends: 32 [2021-10-21 20:30:04,790 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 20:30:04,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:30:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 20:30:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-10-21 20:30:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 23 states have internal predecessors, (25), 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 20:30:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-21 20:30:04,797 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 8 [2021-10-21 20:30:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:04,798 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-21 20:30:04,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-21 20:30:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 20:30:04,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:04,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:04,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:30:04,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1425324200, now seen corresponding path program 1 times [2021-10-21 20:30:04,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:04,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664682180] [2021-10-21 20:30:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:04,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:04,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:04,929 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 20:30:04,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:04,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664682180] [2021-10-21 20:30:04,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664682180] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:30:04,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:30:04,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:30:04,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967153513] [2021-10-21 20:30:04,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:30:04,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:30:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:30:04,933 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:05,028 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-21 20:30:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:30:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 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 8 [2021-10-21 20:30:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:05,035 INFO L225 Difference]: With dead ends: 31 [2021-10-21 20:30:05,035 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 20:30:05,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:30:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 20:30:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-10-21 20:30:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.6875) internal successors, (27), 24 states have internal predecessors, (27), 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 20:30:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 20:30:05,041 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 8 [2021-10-21 20:30:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:05,041 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 20:30:05,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-21 20:30:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 20:30:05,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:05,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:05,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:30:05,042 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1425324201, now seen corresponding path program 1 times [2021-10-21 20:30:05,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:05,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994459621] [2021-10-21 20:30:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:05,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:05,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:05,119 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 20:30:05,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:05,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994459621] [2021-10-21 20:30:05,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994459621] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:30:05,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:30:05,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:30:05,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621989398] [2021-10-21 20:30:05,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:30:05,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:30:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:30:05,124 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:05,204 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-21 20:30:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:30:05,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 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 8 [2021-10-21 20:30:05,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:05,219 INFO L225 Difference]: With dead ends: 24 [2021-10-21 20:30:05,219 INFO L226 Difference]: Without dead ends: 24 [2021-10-21 20:30:05,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:30:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-21 20:30:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-21 20:30:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 20 states have internal predecessors, (22), 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 20:30:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-21 20:30:05,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2021-10-21 20:30:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:05,224 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-21 20:30:05,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states 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 20:30:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-21 20:30:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:30:05,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:05,226 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:05,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:30:05,226 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:05,227 INFO L82 PathProgramCache]: Analyzing trace with hash 450080617, now seen corresponding path program 1 times [2021-10-21 20:30:05,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:05,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915147201] [2021-10-21 20:30:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:05,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:30:05,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:05,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915147201] [2021-10-21 20:30:05,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915147201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:30:05,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829823906] [2021-10-21 20:30:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:05,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:30:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:30:05,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:30:05,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:30:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:05,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:30:05,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:30:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:30:05,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829823906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:30:05,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:30:05,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 20:30:05,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400512750] [2021-10-21 20:30:05,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:30:05,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:30:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:30:05,545 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:30:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:05,612 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-21 20:30:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:30:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 20:30:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:05,618 INFO L225 Difference]: With dead ends: 31 [2021-10-21 20:30:05,618 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 20:30:05,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:30:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 20:30:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-10-21 20:30:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 23 states have internal predecessors, (25), 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 20:30:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-21 20:30:05,634 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-10-21 20:30:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:05,635 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-21 20:30:05,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:30:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-21 20:30:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:30:05,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:05,637 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:05,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:30:05,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:30:05,850 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:05,851 INFO L82 PathProgramCache]: Analyzing trace with hash 450080667, now seen corresponding path program 1 times [2021-10-21 20:30:05,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:05,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724578983] [2021-10-21 20:30:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:05,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:05,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:30:05,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:05,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724578983] [2021-10-21 20:30:05,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724578983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:30:05,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756100033] [2021-10-21 20:30:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:05,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:30:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:30:06,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:30:06,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:30:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:06,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:30:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:30:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 20:30:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:30:06,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756100033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:30:06,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:30:06,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-10-21 20:30:06,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497697766] [2021-10-21 20:30:06,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:30:06,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:30:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:30:06,256 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:30:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:06,332 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-21 20:30:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:30:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 20:30:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:06,334 INFO L225 Difference]: With dead ends: 27 [2021-10-21 20:30:06,334 INFO L226 Difference]: Without dead ends: 27 [2021-10-21 20:30:06,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:30:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-21 20:30:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-21 20:30:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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 20:30:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-21 20:30:06,343 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-10-21 20:30:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:06,343 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-21 20:30:06,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:30:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-21 20:30:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:30:06,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:06,346 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:06,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:30:06,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 20:30:06,558 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash -615550124, now seen corresponding path program 1 times [2021-10-21 20:30:06,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:06,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167072225] [2021-10-21 20:30:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:06,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:06,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:30:06,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:06,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167072225] [2021-10-21 20:30:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167072225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:30:06,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108084349] [2021-10-21 20:30:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:06,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:30:06,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:30:06,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:30:06,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:30:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:30:06,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:30:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:30:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108084349] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:30:06,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:30:06,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-21 20:30:06,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286218720] [2021-10-21 20:30:06,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:30:06,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:06,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:30:06,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:30:06,850 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:30:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:06,899 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-21 20:30:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:30:06,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 20:30:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:06,902 INFO L225 Difference]: With dead ends: 34 [2021-10-21 20:30:06,902 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 20:30:06,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:30:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 20:30:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-10-21 20:30:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 20:30:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-21 20:30:06,914 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2021-10-21 20:30:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:06,915 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-21 20:30:06,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:30:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-21 20:30:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:30:06,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:30:06,919 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:30:06,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:30:07,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:30:07,134 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:30:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:30:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash 769072305, now seen corresponding path program 2 times [2021-10-21 20:30:07,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:30:07,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355173062] [2021-10-21 20:30:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:30:07,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:30:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:07,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:30:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:30:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:30:07,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:30:07,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355173062] [2021-10-21 20:30:07,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355173062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:30:07,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823367446] [2021-10-21 20:30:07,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:30:07,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:30:07,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:30:07,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:30:07,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:30:07,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 20:30:07,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:30:07,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:30:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:30:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:30:07,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823367446] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:30:07,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:30:07,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-10-21 20:30:07,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998772647] [2021-10-21 20:30:07,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:30:07,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:30:07,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:30:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:30:07,528 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states 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 20:30:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:30:07,558 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-21 20:30:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:30:07,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-21 20:30:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:30:07,560 INFO L225 Difference]: With dead ends: 30 [2021-10-21 20:30:07,560 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:30:07,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:30:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:30:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:30:07,561 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 20:30:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:30:07,561 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-10-21 20:30:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:30:07,562 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:30:07,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states 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 20:30:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:30:07,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:30:07,564 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:30:07,565 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:30:07,565 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:30:07,568 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:30:07,569 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:30:07,576 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:30:07,577 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:30:07,577 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:30:07,577 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:30:07,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:30:07,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:30:07,794 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:30:07,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:30:07 BoogieIcfgContainer [2021-10-21 20:30:07,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:30:07,797 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:30:07,797 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:30:07,797 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:30:07,797 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:30:04" (3/4) ... [2021-10-21 20:30:07,800 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:30:07,812 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 20:30:07,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 20:30:07,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-21 20:30:07,820 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-21 20:30:07,820 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:30:07,820 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:30:07,858 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:30:07,858 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:30:07,860 INFO L168 Benchmark]: Toolchain (without parser) took 4426.42 ms. Allocated memory was 142.6 MB in the beginning and 186.6 MB in the end (delta: 44.0 MB). Free memory was 106.3 MB in the beginning and 96.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:30:07,861 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 142.6 MB. Free memory was 113.3 MB in the beginning and 113.3 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:30:07,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.97 ms. Allocated memory is still 142.6 MB. Free memory was 105.9 MB in the beginning and 116.9 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:30:07,863 INFO L168 Benchmark]: Boogie Preprocessor took 32.14 ms. Allocated memory is still 142.6 MB. Free memory was 116.9 MB in the beginning and 114.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:30:07,863 INFO L168 Benchmark]: RCFGBuilder took 347.71 ms. Allocated memory is still 142.6 MB. Free memory was 114.8 MB in the beginning and 105.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:30:07,863 INFO L168 Benchmark]: TraceAbstraction took 3698.19 ms. Allocated memory was 142.6 MB in the beginning and 186.6 MB in the end (delta: 44.0 MB). Free memory was 104.4 MB in the beginning and 98.4 MB in the end (delta: 5.9 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:30:07,864 INFO L168 Benchmark]: Witness Printer took 61.40 ms. Allocated memory is still 186.6 MB. Free memory was 98.4 MB in the beginning and 96.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:30:07,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 142.6 MB. Free memory was 113.3 MB in the beginning and 113.3 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.97 ms. Allocated memory is still 142.6 MB. Free memory was 105.9 MB in the beginning and 116.9 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.14 ms. Allocated memory is still 142.6 MB. Free memory was 116.9 MB in the beginning and 114.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 347.71 ms. Allocated memory is still 142.6 MB. Free memory was 114.8 MB in the beginning and 105.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3698.19 ms. Allocated memory was 142.6 MB in the beginning and 186.6 MB in the end (delta: 44.0 MB). Free memory was 104.4 MB in the beginning and 98.4 MB in the end (delta: 5.9 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. * Witness Printer took 61.40 ms. Allocated memory is still 186.6 MB. Free memory was 98.4 MB in the beginning and 96.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: 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 3 procedures, 29 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 3632.8ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 19.5ms, AutomataDifference: 679.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 134 SDtfs, 61 SDslu, 119 SDs, 0 SdLazy, 295 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 381.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 228.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=7, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84.3ms AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 69.7ms SsaConstructionTime, 205.8ms SatisfiabilityAnalysisTime, 1286.6ms InterpolantComputationTime, 180 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 168 ConstructedInterpolants, 1 QuantifiedInterpolants, 747 SizeOfPredicates, 0 NumberOfNonLiveVariables, 237 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 28/92 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 20:30:07,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27dbcf7-14db-49f1-8ae4-994ed6159d2d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...