./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/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_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/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_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:13:58,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:13:58,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:13:58,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:13:58,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:13:58,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:13:58,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:13:58,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:13:58,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:13:58,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:13:58,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:13:58,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:13:58,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:13:58,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:13:58,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:13:58,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:13:58,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:13:58,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:13:58,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:13:58,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:13:58,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:13:58,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:13:58,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:13:58,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:13:58,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:13:58,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:13:58,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:13:58,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:13:58,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:13:58,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:13:58,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:13:58,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:13:58,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:13:58,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:13:58,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:13:58,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:13:58,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:13:58,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:13:58,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:13:58,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:13:58,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:13:58,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:13:58,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:13:58,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:13:58,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:13:58,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:13:58,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:13:58,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:13:58,366 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:13:58,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:13:58,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:13:58,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:13:58,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:13:58,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:13:58,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:13:58,368 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:13:58,369 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:13:58,369 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:13:58,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:13:58,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:13:58,369 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:13:58,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:13:58,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:13:58,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:13:58,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:13:58,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:13:58,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:13:58,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:13:58,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:13:58,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:13:58,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:13:58,373 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_aa21174a-c8d4-4efe-8fb9-704188be0c49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 [2021-10-21 20:13:58,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:13:58,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:13:58,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:13:58,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:13:58,679 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:13:58,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety/test-0232-1.i [2021-10-21 20:13:58,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/b12b19fc5/283b6defa5b24b609e1483a840cd48ad/FLAG24a5e0f3c [2021-10-21 20:13:59,409 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:13:59,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/sv-benchmarks/c/memsafety/test-0232-1.i [2021-10-21 20:13:59,432 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/b12b19fc5/283b6defa5b24b609e1483a840cd48ad/FLAG24a5e0f3c [2021-10-21 20:13:59,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/b12b19fc5/283b6defa5b24b609e1483a840cd48ad [2021-10-21 20:13:59,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:13:59,712 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:13:59,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:13:59,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:13:59,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:13:59,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:13:59" (1/1) ... [2021-10-21 20:13:59,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1abd0f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:59, skipping insertion in model container [2021-10-21 20:13:59,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:13:59" (1/1) ... [2021-10-21 20:13:59,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:13:59,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:14:00,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:14:00,076 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:14:00,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:14:00,148 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:14:00,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00 WrapperNode [2021-10-21 20:14:00,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:14:00,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:14:00,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:14:00,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:14:00,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:14:00,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:14:00,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:14:00,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:14:00,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (1/1) ... [2021-10-21 20:14:00,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:14:00,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:14:00,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:14:00,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:14:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:14:00,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:14:00,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 20:14:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 20:14:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 20:14:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 20:14:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 20:14:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 20:14:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-10-21 20:14:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:14:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:14:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 20:14:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 20:14:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 20:14:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 20:14:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:14:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 20:14:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 20:14:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 20:14:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 20:14:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 20:14:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 20:14:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 20:14:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 20:14:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 20:14:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 20:14:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 20:14:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 20:14:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 20:14:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 20:14:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 20:14:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 20:14:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 20:14:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 20:14:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 20:14:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 20:14:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 20:14:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 20:14:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 20:14:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 20:14:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 20:14:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 20:14:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 20:14:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 20:14:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 20:14:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 20:14:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 20:14:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 20:14:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 20:14:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 20:14:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 20:14:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 20:14:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 20:14:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 20:14:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 20:14:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 20:14:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 20:14:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 20:14:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 20:14:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 20:14:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 20:14:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 20:14:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 20:14:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 20:14:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 20:14:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 20:14:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 20:14:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 20:14:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 20:14:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 20:14:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 20:14:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:14:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 20:14:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 20:14:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:14:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 20:14:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 20:14:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 20:14:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 20:14:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 20:14:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 20:14:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 20:14:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 20:14:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 20:14:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 20:14:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 20:14:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 20:14:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 20:14:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 20:14:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 20:14:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 20:14:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 20:14:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 20:14:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 20:14:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 20:14:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 20:14:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 20:14:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 20:14:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 20:14:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 20:14:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 20:14:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 20:14:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 20:14:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 20:14:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 20:14:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 20:14:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 20:14:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 20:14:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:14:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-10-21 20:14:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 20:14:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 20:14:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 20:14:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:14:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-21 20:14:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:14:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:14:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:14:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:14:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:14:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:14:00,956 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:14:00,956 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 20:14:00,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:14:00 BoogieIcfgContainer [2021-10-21 20:14:00,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:14:00,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:14:00,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:14:00,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:14:00,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:13:59" (1/3) ... [2021-10-21 20:14:00,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69890be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:14:00, skipping insertion in model container [2021-10-21 20:14:00,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:00" (2/3) ... [2021-10-21 20:14:00,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69890be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:14:00, skipping insertion in model container [2021-10-21 20:14:00,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:14:00" (3/3) ... [2021-10-21 20:14:00,972 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-10-21 20:14:00,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:14:00,977 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-10-21 20:14:01,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:14:01,027 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 20:14:01,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-10-21 20:14:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 20:14:01,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:01,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:01,056 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:01,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:01,067 INFO L82 PathProgramCache]: Analyzing trace with hash 726856395, now seen corresponding path program 1 times [2021-10-21 20:14:01,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:01,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434307265] [2021-10-21 20:14:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:01,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:01,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:01,364 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 20:14:01,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:01,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434307265] [2021-10-21 20:14:01,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434307265] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:01,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:01,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:14:01,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226011420] [2021-10-21 20:14:01,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:14:01,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:14:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:14:01,398 INFO L87 Difference]: Start difference. First operand has 89 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 20:14:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:01,596 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-10-21 20:14:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:14:01,598 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 20:14:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:01,607 INFO L225 Difference]: With dead ends: 89 [2021-10-21 20:14:01,607 INFO L226 Difference]: Without dead ends: 86 [2021-10-21 20:14:01,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:14:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-21 20:14:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-21 20:14:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 40 states have (on average 2.1) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-10-21 20:14:01,658 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 8 [2021-10-21 20:14:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:01,658 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-10-21 20:14:01,659 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 20:14:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-10-21 20:14:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:14:01,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:01,660 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:01,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:14:01,660 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1057814912, now seen corresponding path program 1 times [2021-10-21 20:14:01,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:01,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514557825] [2021-10-21 20:14:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:01,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:01,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:01,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:01,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514557825] [2021-10-21 20:14:01,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514557825] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:01,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:01,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:14:01,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733595358] [2021-10-21 20:14:01,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:14:01,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:14:01,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:14:01,869 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 20:14:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:02,110 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-10-21 20:14:02,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:14:02,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 9 [2021-10-21 20:14:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:02,113 INFO L225 Difference]: With dead ends: 78 [2021-10-21 20:14:02,114 INFO L226 Difference]: Without dead ends: 78 [2021-10-21 20:14:02,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-21 20:14:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-21 20:14:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.9) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-10-21 20:14:02,141 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 9 [2021-10-21 20:14:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:02,141 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-10-21 20:14:02,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 20:14:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-10-21 20:14:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:14:02,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:02,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:02,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:14:02,143 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1057814913, now seen corresponding path program 1 times [2021-10-21 20:14:02,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:02,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26110959] [2021-10-21 20:14:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:02,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:02,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:02,340 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 20:14:02,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:02,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26110959] [2021-10-21 20:14:02,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26110959] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:02,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:02,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:14:02,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767177975] [2021-10-21 20:14:02,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:14:02,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:14:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:14:02,349 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 20:14:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:02,614 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-10-21 20:14:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 9 [2021-10-21 20:14:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:02,627 INFO L225 Difference]: With dead ends: 96 [2021-10-21 20:14:02,627 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 20:14:02,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 20:14:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-10-21 20:14:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 77 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-10-21 20:14:02,642 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 9 [2021-10-21 20:14:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:02,652 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-10-21 20:14:02,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 20:14:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-10-21 20:14:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:14:02,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:02,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:02,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:14:02,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1567476021, now seen corresponding path program 1 times [2021-10-21 20:14:02,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:02,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726480041] [2021-10-21 20:14:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:02,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:02,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:02,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:02,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726480041] [2021-10-21 20:14:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726480041] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:02,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:14:02,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685298722] [2021-10-21 20:14:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:14:02,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:14:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:14:02,705 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:14:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:02,828 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-10-21 20:14:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:14:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2021-10-21 20:14:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:02,830 INFO L225 Difference]: With dead ends: 79 [2021-10-21 20:14:02,830 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 20:14:02,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:14:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 20:14:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-21 20:14:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.653061224489796) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-10-21 20:14:02,850 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 10 [2021-10-21 20:14:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:02,850 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-10-21 20:14:02,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:14:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-10-21 20:14:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:14:02,851 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:02,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:02,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:14:02,851 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1567476020, now seen corresponding path program 1 times [2021-10-21 20:14:02,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:02,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610858506] [2021-10-21 20:14:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:02,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:02,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:02,953 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 20:14:02,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610858506] [2021-10-21 20:14:02,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610858506] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:02,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:02,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:14:02,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124674914] [2021-10-21 20:14:02,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:14:02,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:14:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:14:02,956 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:14:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:03,070 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-10-21 20:14:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:14:03,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2021-10-21 20:14:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:03,072 INFO L225 Difference]: With dead ends: 75 [2021-10-21 20:14:03,072 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 20:14:03,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:14:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 20:14:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-21 20:14:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 69 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-10-21 20:14:03,085 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 10 [2021-10-21 20:14:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:03,086 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-10-21 20:14:03,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:14:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-10-21 20:14:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:14:03,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:03,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:03,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:14:03,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:03,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1388861269, now seen corresponding path program 1 times [2021-10-21 20:14:03,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:03,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559529444] [2021-10-21 20:14:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:03,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:03,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:03,275 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 20:14:03,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:03,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559529444] [2021-10-21 20:14:03,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559529444] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:03,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:03,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:14:03,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589977939] [2021-10-21 20:14:03,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:14:03,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:14:03,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:14:03,278 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 20:14:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:03,558 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-10-21 20:14:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:14:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 15 [2021-10-21 20:14:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:03,560 INFO L225 Difference]: With dead ends: 86 [2021-10-21 20:14:03,560 INFO L226 Difference]: Without dead ends: 86 [2021-10-21 20:14:03,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:14:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-21 20:14:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-10-21 20:14:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.490909090909091) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2021-10-21 20:14:03,566 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 15 [2021-10-21 20:14:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:03,567 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2021-10-21 20:14:03,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 20:14:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2021-10-21 20:14:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:14:03,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:03,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:03,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:14:03,568 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:03,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:03,569 INFO L82 PathProgramCache]: Analyzing trace with hash -104748240, now seen corresponding path program 1 times [2021-10-21 20:14:03,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:03,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059223175] [2021-10-21 20:14:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:03,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:03,677 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 20:14:03,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:03,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059223175] [2021-10-21 20:14:03,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059223175] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:03,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:03,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:14:03,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071065847] [2021-10-21 20:14:03,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:14:03,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:14:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:03,680 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 20:14:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:03,848 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-10-21 20:14:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:03,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 16 [2021-10-21 20:14:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:03,850 INFO L225 Difference]: With dead ends: 81 [2021-10-21 20:14:03,850 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 20:14:03,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:14:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 20:14:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-10-21 20:14:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5) internal successors, (78), 71 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-10-21 20:14:03,861 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 16 [2021-10-21 20:14:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:03,861 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-10-21 20:14:03,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 20:14:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-10-21 20:14:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:14:03,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:03,863 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:03,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:14:03,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1762060380, now seen corresponding path program 1 times [2021-10-21 20:14:03,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:03,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014572893] [2021-10-21 20:14:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:03,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:03,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:04,023 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 20:14:04,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:04,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014572893] [2021-10-21 20:14:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014572893] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:04,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:04,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:14:04,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253252073] [2021-10-21 20:14:04,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:14:04,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:14:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:14:04,026 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:04,310 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-10-21 20:14:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:14:04,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-21 20:14:04,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:04,312 INFO L225 Difference]: With dead ends: 86 [2021-10-21 20:14:04,312 INFO L226 Difference]: Without dead ends: 86 [2021-10-21 20:14:04,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:14:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-21 20:14:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2021-10-21 20:14:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-10-21 20:14:04,316 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 24 [2021-10-21 20:14:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:04,317 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-10-21 20:14:04,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-10-21 20:14:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:14:04,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:04,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:04,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:14:04,318 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1762060381, now seen corresponding path program 1 times [2021-10-21 20:14:04,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:04,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927072017] [2021-10-21 20:14:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:04,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:04,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:04,481 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 20:14:04,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:04,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927072017] [2021-10-21 20:14:04,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927072017] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:04,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:04,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:14:04,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350093702] [2021-10-21 20:14:04,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:14:04,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:04,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:14:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:14:04,484 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:04,812 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-10-21 20:14:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:14:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-21 20:14:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:04,813 INFO L225 Difference]: With dead ends: 88 [2021-10-21 20:14:04,813 INFO L226 Difference]: Without dead ends: 88 [2021-10-21 20:14:04,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:14:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-21 20:14:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-10-21 20:14:04,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-10-21 20:14:04,817 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 24 [2021-10-21 20:14:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:04,817 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-10-21 20:14:04,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-10-21 20:14:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:14:04,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:04,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:04,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:14:04,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1143077172, now seen corresponding path program 1 times [2021-10-21 20:14:04,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:04,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493661219] [2021-10-21 20:14:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:04,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:04,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:04,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:04,941 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 20:14:04,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:04,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493661219] [2021-10-21 20:14:04,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493661219] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:04,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:04,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:14:04,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957035103] [2021-10-21 20:14:04,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:14:04,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:14:04,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:04,945 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:05,162 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-10-21 20:14:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:14:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-21 20:14:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:05,164 INFO L225 Difference]: With dead ends: 70 [2021-10-21 20:14:05,164 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:14:05,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:14:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:14:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-21 20:14:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.434782608695652) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-10-21 20:14:05,171 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 26 [2021-10-21 20:14:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:05,171 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-10-21 20:14:05,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-10-21 20:14:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:14:05,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:05,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:05,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:14:05,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:05,176 INFO L82 PathProgramCache]: Analyzing trace with hash 450500818, now seen corresponding path program 1 times [2021-10-21 20:14:05,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:05,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710030698] [2021-10-21 20:14:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:05,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:05,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:05,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:05,300 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 20:14:05,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:05,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710030698] [2021-10-21 20:14:05,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710030698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:05,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:05,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:14:05,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061051234] [2021-10-21 20:14:05,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:14:05,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:14:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:05,303 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:05,538 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-10-21 20:14:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:14:05,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-10-21 20:14:05,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:05,540 INFO L225 Difference]: With dead ends: 69 [2021-10-21 20:14:05,540 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:14:05,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:14:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:14:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 20:14:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 62 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-10-21 20:14:05,543 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 27 [2021-10-21 20:14:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:05,544 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-10-21 20:14:05,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-10-21 20:14:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:14:05,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:05,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:05,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 20:14:05,546 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr9ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1080623549, now seen corresponding path program 1 times [2021-10-21 20:14:05,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:05,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800357886] [2021-10-21 20:14:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:05,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:05,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:05,678 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 20:14:05,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:05,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800357886] [2021-10-21 20:14:05,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800357886] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:05,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:05,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:14:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693931218] [2021-10-21 20:14:05,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:14:05,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:14:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:05,680 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:05,923 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-21 20:14:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:14:05,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-10-21 20:14:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:05,925 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:14:05,925 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 20:14:05,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:14:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 20:14:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-21 20:14:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.391304347826087) internal successors, (64), 61 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-10-21 20:14:05,928 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 28 [2021-10-21 20:14:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:05,929 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-10-21 20:14:05,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-10-21 20:14:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:14:05,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:05,930 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:05,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:14:05,931 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:05,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1016891037, now seen corresponding path program 1 times [2021-10-21 20:14:05,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:05,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177976929] [2021-10-21 20:14:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:05,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:06,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:06,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:06,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:06,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177976929] [2021-10-21 20:14:06,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177976929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:06,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638305723] [2021-10-21 20:14:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:06,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:14:06,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:14:06,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:14:06,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:14:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:06,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 20:14:06,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:06,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2021-10-21 20:14:06,695 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-10-21 20:14:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-10-21 20:14:06,820 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:06,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-10-21 20:14:06,994 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:14:06,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-21 20:14:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:07,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638305723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:07,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:14:07,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-21 20:14:07,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484817081] [2021-10-21 20:14:07,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:14:07,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:07,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:14:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:14:07,040 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:14:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:07,831 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-10-21 20:14:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:14:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-10-21 20:14:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:07,832 INFO L225 Difference]: With dead ends: 74 [2021-10-21 20:14:07,832 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 20:14:07,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-10-21 20:14:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 20:14:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-10-21 20:14:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.34) internal successors, (67), 65 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-10-21 20:14:07,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 29 [2021-10-21 20:14:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:07,836 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-10-21 20:14:07,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:14:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-10-21 20:14:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:14:07,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:07,837 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:07,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:08,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:14:08,038 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1016891038, now seen corresponding path program 1 times [2021-10-21 20:14:08,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:08,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000544766] [2021-10-21 20:14:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:08,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:08,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:08,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:08,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000544766] [2021-10-21 20:14:08,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000544766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:08,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151556007] [2021-10-21 20:14:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:08,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:14:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:14:08,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:14:08,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:14:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 20:14:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:08,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-21 20:14:08,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 20:14:08,891 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 20:14:08,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-21 20:14:08,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-21 20:14:09,038 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:09,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-10-21 20:14:09,053 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:09,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-10-21 20:14:09,258 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:14:09,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-10-21 20:14:09,266 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:14:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-10-21 20:14:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:09,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151556007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:09,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:14:09,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-21 20:14:09,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742162960] [2021-10-21 20:14:09,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:14:09,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:14:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:14:09,315 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:14:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:10,249 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-10-21 20:14:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:14:10,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-10-21 20:14:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:10,251 INFO L225 Difference]: With dead ends: 73 [2021-10-21 20:14:10,251 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 20:14:10,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 791.7ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-10-21 20:14:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 20:14:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-10-21 20:14:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.32) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-10-21 20:14:10,254 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 29 [2021-10-21 20:14:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:10,254 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-10-21 20:14:10,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:14:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-10-21 20:14:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:14:10,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:10,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:10,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:10,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 20:14:10,465 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash -860408268, now seen corresponding path program 1 times [2021-10-21 20:14:10,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:10,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706092534] [2021-10-21 20:14:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:10,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:10,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:10,546 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 20:14:10,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:10,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706092534] [2021-10-21 20:14:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706092534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:10,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:10,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:14:10,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853601614] [2021-10-21 20:14:10,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:14:10,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:14:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:14:10,549 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:10,718 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-10-21 20:14:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:10,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-10-21 20:14:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:10,721 INFO L225 Difference]: With dead ends: 70 [2021-10-21 20:14:10,721 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:14:10,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:14:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:14:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-21 20:14:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.3) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-10-21 20:14:10,727 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 29 [2021-10-21 20:14:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:10,727 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-10-21 20:14:10,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-10-21 20:14:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:14:10,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:10,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:10,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 20:14:10,730 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash -902852448, now seen corresponding path program 1 times [2021-10-21 20:14:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:10,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621192759] [2021-10-21 20:14:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:10,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:10,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:10,897 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 20:14:10,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:10,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621192759] [2021-10-21 20:14:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621192759] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:10,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:10,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:14:10,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939288673] [2021-10-21 20:14:10,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:14:10,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:14:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:14:10,900 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:11,114 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-10-21 20:14:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:14:11,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-10-21 20:14:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:11,116 INFO L225 Difference]: With dead ends: 69 [2021-10-21 20:14:11,116 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:14:11,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:14:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:14:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 20:14:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.28) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-10-21 20:14:11,120 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 30 [2021-10-21 20:14:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:11,120 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-10-21 20:14:11,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-10-21 20:14:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:14:11,121 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:11,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:11,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 20:14:11,121 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:11,122 INFO L82 PathProgramCache]: Analyzing trace with hash -902852447, now seen corresponding path program 1 times [2021-10-21 20:14:11,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:11,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093317753] [2021-10-21 20:14:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:11,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:11,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:14:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:11,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:14:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:11,218 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 20:14:11,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:11,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093317753] [2021-10-21 20:14:11,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093317753] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:11,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:11,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:14:11,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360817961] [2021-10-21 20:14:11,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:14:11,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:14:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:14:11,223 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:11,352 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-10-21 20:14:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:14:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-10-21 20:14:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:11,357 INFO L225 Difference]: With dead ends: 64 [2021-10-21 20:14:11,357 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:14:11,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:14:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:14:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-21 20:14:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.18) internal successors, (59), 57 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-10-21 20:14:11,363 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 30 [2021-10-21 20:14:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:11,364 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-10-21 20:14:11,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-10-21 20:14:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 20:14:11,367 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:11,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:11,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 20:14:11,368 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash 281339622, now seen corresponding path program 1 times [2021-10-21 20:14:11,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:11,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142454897] [2021-10-21 20:14:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:11,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:14:11,412 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:14:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:14:11,476 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:14:11,478 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:14:11,479 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:14:11,481 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:14:11,482 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:14:11,482 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:14:11,482 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:14:11,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:14:11,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:14:11,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:14:11,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:14:11,484 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:14:11,484 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:14:11,484 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:14:11,484 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 20:14:11,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 20:14:11,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 20:14:11,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 20:14:11,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 20:14:11,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 20:14:11,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 20:14:11,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-21 20:14:11,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-21 20:14:11,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-21 20:14:11,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:14:11,487 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:14:11,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:14:11,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-21 20:14:11,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-21 20:14:11,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-10-21 20:14:11,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-10-21 20:14:11,490 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-10-21 20:14:11,490 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-10-21 20:14:11,490 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-10-21 20:14:11,490 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-10-21 20:14:11,491 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-10-21 20:14:11,491 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-10-21 20:14:11,491 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-10-21 20:14:11,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-10-21 20:14:11,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-10-21 20:14:11,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-10-21 20:14:11,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-10-21 20:14:11,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-10-21 20:14:11,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 20:14:11,500 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:14:11,533 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 20:14:11,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:14:11 BoogieIcfgContainer [2021-10-21 20:14:11,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:14:11,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:14:11,567 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:14:11,567 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:14:11,568 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:14:00" (3/4) ... [2021-10-21 20:14:11,573 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:14:11,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:14:11,574 INFO L168 Benchmark]: Toolchain (without parser) took 11861.62 ms. Allocated memory was 83.9 MB in the beginning and 159.4 MB in the end (delta: 75.5 MB). Free memory was 48.5 MB in the beginning and 102.4 MB in the end (delta: -53.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:14:11,575 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 83.9 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:14:11,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 431.94 ms. Allocated memory was 83.9 MB in the beginning and 109.1 MB in the end (delta: 25.2 MB). Free memory was 48.3 MB in the beginning and 76.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:14:11,576 INFO L168 Benchmark]: Boogie Preprocessor took 60.56 ms. Allocated memory is still 109.1 MB. Free memory was 76.9 MB in the beginning and 74.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:14:11,577 INFO L168 Benchmark]: RCFGBuilder took 747.08 ms. Allocated memory is still 109.1 MB. Free memory was 74.4 MB in the beginning and 82.4 MB in the end (delta: -8.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:14:11,577 INFO L168 Benchmark]: TraceAbstraction took 10606.97 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 81.9 MB in the beginning and 103.4 MB in the end (delta: -21.6 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:14:11,578 INFO L168 Benchmark]: Witness Printer took 6.43 ms. Allocated memory is still 159.4 MB. Free memory was 103.4 MB in the beginning and 102.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:14:11,582 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 83.9 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 431.94 ms. Allocated memory was 83.9 MB in the beginning and 109.1 MB in the end (delta: 25.2 MB). Free memory was 48.3 MB in the beginning and 76.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.56 ms. Allocated memory is still 109.1 MB. Free memory was 76.9 MB in the beginning and 74.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 747.08 ms. Allocated memory is still 109.1 MB. Free memory was 74.4 MB in the beginning and 82.4 MB in the end (delta: -8.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10606.97 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 81.9 MB in the beginning and 103.4 MB in the end (delta: -21.6 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * Witness Printer took 6.43 ms. Allocated memory is still 159.4 MB. Free memory was 103.4 MB in the beginning and 102.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * 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 - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={3:0}] [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={1:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={1:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={1:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={1:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={1:0}, list={3:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={1:0}, list={3:0}] [L544] EXPR list->next VAL [\read(*list)={1:0}, list={3:0}, list->next={0:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={3:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={3:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 107 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 10479.0ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 32.1ms, AutomataDifference: 5047.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 797 SDtfs, 731 SDslu, 2258 SDs, 0 SdLazy, 3855 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2576.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 261 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2631.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=0, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 153.5ms AutomataMinimizationTime, 17 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 79.4ms SsaConstructionTime, 382.8ms SatisfiabilityAnalysisTime, 3643.2ms InterpolantComputationTime, 445 NumberOfCodeBlocks, 445 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 392 ConstructedInterpolants, 12 QuantifiedInterpolants, 3743 SizeOfPredicates, 32 NumberOfNonLiveVariables, 450 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 6/28 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 20:14:11,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:14:14,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:14:14,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:14:14,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:14:14,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:14:14,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:14:14,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:14:14,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:14:14,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:14:14,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:14:14,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:14:14,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:14:14,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:14:14,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:14:14,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:14:14,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:14:14,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:14:14,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:14:14,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:14:14,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:14:14,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:14:14,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:14:14,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:14:14,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:14:14,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:14:14,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:14:14,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:14:14,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:14:14,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:14:14,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:14:14,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:14:14,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:14:14,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:14:14,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:14:14,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:14:14,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:14:14,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:14:14,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:14:14,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:14:14,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:14:14,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:14:14,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-21 20:14:14,129 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:14:14,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:14:14,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:14:14,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:14:14,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:14:14,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:14:14,133 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:14:14,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:14:14,134 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:14:14,134 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:14:14,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:14:14,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:14:14,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:14:14,136 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:14:14,136 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:14:14,137 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:14:14,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:14:14,138 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:14:14,138 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 20:14:14,139 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 20:14:14,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:14:14,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:14:14,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:14:14,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:14:14,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:14:14,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:14:14,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:14:14,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:14:14,141 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 20:14:14,142 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 20:14:14,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:14:14,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 20:14:14,143 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_aa21174a-c8d4-4efe-8fb9-704188be0c49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 [2021-10-21 20:14:14,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:14:14,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:14:14,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:14:14,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:14:14,515 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:14:14,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety/test-0232-1.i [2021-10-21 20:14:14,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/a00c35e02/8d860373198d469fb36c308af472e089/FLAG1cd7268b7 [2021-10-21 20:14:15,200 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:14:15,200 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/sv-benchmarks/c/memsafety/test-0232-1.i [2021-10-21 20:14:15,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/a00c35e02/8d860373198d469fb36c308af472e089/FLAG1cd7268b7 [2021-10-21 20:14:15,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/data/a00c35e02/8d860373198d469fb36c308af472e089 [2021-10-21 20:14:15,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:14:15,491 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:14:15,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:14:15,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:14:15,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:14:15,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:14:15" (1/1) ... [2021-10-21 20:14:15,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c27761c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:15, skipping insertion in model container [2021-10-21 20:14:15,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:14:15" (1/1) ... [2021-10-21 20:14:15,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:14:15,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:14:16,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:14:16,038 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:14:16,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:14:16,161 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:14:16,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16 WrapperNode [2021-10-21 20:14:16,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:14:16,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:14:16,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:14:16,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:14:16,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:14:16,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:14:16,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:14:16,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:14:16,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (1/1) ... [2021-10-21 20:14:16,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:14:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:14:16,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:14:16,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:14:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:14:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:14:16,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 20:14:16,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 20:14:16,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 20:14:16,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 20:14:16,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 20:14:16,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 20:14:16,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 20:14:16,383 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-10-21 20:14:16,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:14:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:14:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 20:14:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 20:14:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 20:14:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 20:14:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:14:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 20:14:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 20:14:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 20:14:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 20:14:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 20:14:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 20:14:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 20:14:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 20:14:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 20:14:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 20:14:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 20:14:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 20:14:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 20:14:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 20:14:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 20:14:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 20:14:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 20:14:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 20:14:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 20:14:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 20:14:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 20:14:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 20:14:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 20:14:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 20:14:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 20:14:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 20:14:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 20:14:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 20:14:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 20:14:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 20:14:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 20:14:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 20:14:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 20:14:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 20:14:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 20:14:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 20:14:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 20:14:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 20:14:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 20:14:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 20:14:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 20:14:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 20:14:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 20:14:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 20:14:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 20:14:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 20:14:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 20:14:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 20:14:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 20:14:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 20:14:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 20:14:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 20:14:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 20:14:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 20:14:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 20:14:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:14:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 20:14:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 20:14:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:14:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 20:14:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 20:14:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 20:14:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 20:14:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 20:14:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 20:14:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 20:14:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 20:14:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 20:14:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 20:14:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 20:14:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 20:14:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 20:14:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 20:14:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 20:14:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 20:14:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 20:14:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 20:14:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 20:14:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 20:14:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 20:14:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 20:14:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 20:14:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 20:14:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 20:14:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 20:14:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 20:14:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 20:14:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 20:14:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 20:14:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 20:14:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 20:14:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 20:14:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 20:14:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 20:14:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 20:14:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 20:14:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 20:14:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 20:14:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 20:14:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 20:14:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 20:14:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 20:14:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 20:14:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 20:14:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 20:14:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 20:14:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:14:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-10-21 20:14:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 20:14:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 20:14:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 20:14:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:14:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-21 20:14:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:14:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:14:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 20:14:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:14:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 20:14:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 20:14:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 20:14:17,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:14:17,262 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 20:14:17,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:14:17 BoogieIcfgContainer [2021-10-21 20:14:17,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:14:17,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:14:17,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:14:17,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:14:17,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:14:15" (1/3) ... [2021-10-21 20:14:17,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d3b7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:14:17, skipping insertion in model container [2021-10-21 20:14:17,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:14:16" (2/3) ... [2021-10-21 20:14:17,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d3b7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:14:17, skipping insertion in model container [2021-10-21 20:14:17,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:14:17" (3/3) ... [2021-10-21 20:14:17,273 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-10-21 20:14:17,279 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:14:17,279 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-10-21 20:14:17,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:14:17,332 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 20:14:17,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-10-21 20:14:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 20:14:17,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:17,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:17,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:17,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1666262251, now seen corresponding path program 1 times [2021-10-21 20:14:17,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:17,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133084424] [2021-10-21 20:14:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:17,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:17,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:17,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 20:14:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 20:14:17,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:17,626 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 20:14:17,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:17,675 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 20:14:17,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:17,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133084424] [2021-10-21 20:14:17,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133084424] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:17,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:17,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 20:14:17,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535246612] [2021-10-21 20:14:17,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:14:17,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:14:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:14:17,708 INFO L87 Difference]: Start difference. First operand has 88 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 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 20:14:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:17,735 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-10-21 20:14:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:14:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 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 20:14:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:17,747 INFO L225 Difference]: With dead ends: 88 [2021-10-21 20:14:17,748 INFO L226 Difference]: Without dead ends: 85 [2021-10-21 20:14:17,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:14:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-21 20:14:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-10-21 20:14:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 39 states have (on average 2.128205128205128) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-10-21 20:14:17,804 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 8 [2021-10-21 20:14:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:17,805 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-10-21 20:14:17,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 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 20:14:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-10-21 20:14:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:14:17,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:17,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:17,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:18,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:18,020 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash 114625428, now seen corresponding path program 1 times [2021-10-21 20:14:18,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:18,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306860756] [2021-10-21 20:14:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:18,023 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:18,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:18,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 20:14:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:18,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:14:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:18,295 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 20:14:18,396 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-21 20:14:18,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-10-21 20:14:18,467 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 20:14:18,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:18,575 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 20:14:18,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:18,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306860756] [2021-10-21 20:14:18,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306860756] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:18,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:18,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-21 20:14:18,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986099444] [2021-10-21 20:14:18,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:14:18,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:14:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:14:18,585 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 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 20:14:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:19,045 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-10-21 20:14:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:14:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 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 9 [2021-10-21 20:14:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:19,049 INFO L225 Difference]: With dead ends: 77 [2021-10-21 20:14:19,050 INFO L226 Difference]: Without dead ends: 77 [2021-10-21 20:14:19,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:14:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-21 20:14:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-21 20:14:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-10-21 20:14:19,067 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 9 [2021-10-21 20:14:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:19,067 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-10-21 20:14:19,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 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 20:14:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-10-21 20:14:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:14:19,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:19,068 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:19,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:19,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:19,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:19,270 INFO L82 PathProgramCache]: Analyzing trace with hash 114625429, now seen corresponding path program 1 times [2021-10-21 20:14:19,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:19,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470630446] [2021-10-21 20:14:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:19,271 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:19,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:19,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 20:14:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 20:14:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:19,445 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 20:14:19,452 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 20:14:19,580 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 20:14:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-10-21 20:14:19,596 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 20:14:19,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-10-21 20:14:19,635 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 20:14:19,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:20,663 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 20:14:20,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:20,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470630446] [2021-10-21 20:14:20,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470630446] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:20,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:20,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-21 20:14:20,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627305418] [2021-10-21 20:14:20,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:14:20,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:14:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:20,666 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:32,013 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-21 20:14:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-21 20:14:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:32,017 INFO L225 Difference]: With dead ends: 96 [2021-10-21 20:14:32,017 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 20:14:32,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 947.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:14:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 20:14:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-10-21 20:14:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 72 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-10-21 20:14:32,027 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 9 [2021-10-21 20:14:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:32,027 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-10-21 20:14:32,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:14:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-10-21 20:14:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:14:32,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:32,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:32,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:32,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:32,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -741578931, now seen corresponding path program 1 times [2021-10-21 20:14:32,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:32,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726792951] [2021-10-21 20:14:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:32,247 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:32,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:32,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:32,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 20:14:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:14:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:32,424 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 20:14:32,455 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 20:14:32,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:32,552 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 20:14:32,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:32,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726792951] [2021-10-21 20:14:32,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726792951] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:32,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:32,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-21 20:14:32,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160214178] [2021-10-21 20:14:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:14:32,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:14:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:14:32,555 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 20:14:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:32,768 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-10-21 20:14:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:14:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 10 [2021-10-21 20:14:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:32,770 INFO L225 Difference]: With dead ends: 74 [2021-10-21 20:14:32,770 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 20:14:32,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:14:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 20:14:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-21 20:14:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 68 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-10-21 20:14:32,777 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 10 [2021-10-21 20:14:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:32,777 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-10-21 20:14:32,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 20:14:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-10-21 20:14:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:14:32,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:32,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:32,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:32,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:32,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash -741578932, now seen corresponding path program 1 times [2021-10-21 20:14:32,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:32,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087130935] [2021-10-21 20:14:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:32,995 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:32,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:32,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 20:14:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:14:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:33,164 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 20:14:33,181 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 20:14:33,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:33,212 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 20:14:33,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:33,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087130935] [2021-10-21 20:14:33,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087130935] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:33,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:33,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 20:14:33,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354068613] [2021-10-21 20:14:33,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:14:33,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:14:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:14:33,221 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 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 20:14:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:33,361 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-10-21 20:14:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:14:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 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 10 [2021-10-21 20:14:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:33,362 INFO L225 Difference]: With dead ends: 70 [2021-10-21 20:14:33,363 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:14:33,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:14:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:14:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-21 20:14:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 64 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:14:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-21 20:14:33,369 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 10 [2021-10-21 20:14:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:33,370 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-21 20:14:33,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 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 20:14:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-21 20:14:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:14:33,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:33,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:33,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:33,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:33,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:33,588 INFO L82 PathProgramCache]: Analyzing trace with hash -164729953, now seen corresponding path program 1 times [2021-10-21 20:14:33,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:33,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924602039] [2021-10-21 20:14:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:33,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:33,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:33,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:33,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 20:14:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:14:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:33,946 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:33,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2021-10-21 20:14:33,980 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:33,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2021-10-21 20:14:34,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-21 20:14:34,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-21 20:14:34,127 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 20:14:34,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:34,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:34,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924602039] [2021-10-21 20:14:34,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924602039] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:34,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:34,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-21 20:14:34,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207751455] [2021-10-21 20:14:34,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:14:34,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:14:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:14:34,270 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 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 20:14:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:34,905 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-10-21 20:14:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:14:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 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 15 [2021-10-21 20:14:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:34,908 INFO L225 Difference]: With dead ends: 82 [2021-10-21 20:14:34,909 INFO L226 Difference]: Without dead ends: 82 [2021-10-21 20:14:34,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:14:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-21 20:14:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-10-21 20:14:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-10-21 20:14:34,919 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 15 [2021-10-21 20:14:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:34,919 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-10-21 20:14:34,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 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 20:14:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-10-21 20:14:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:14:34,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:34,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:34,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-21 20:14:35,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:35,139 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:35,139 INFO L82 PathProgramCache]: Analyzing trace with hash 486538853, now seen corresponding path program 1 times [2021-10-21 20:14:35,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:35,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544573559] [2021-10-21 20:14:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:35,140 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:35,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:35,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 20:14:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:14:35,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:35,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-21 20:14:35,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-21 20:14:35,649 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 20:14:35,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:35,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-10-21 20:14:36,106 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-21 20:14:36,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 40 [2021-10-21 20:14:36,219 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 20:14:36,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:36,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544573559] [2021-10-21 20:14:36,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544573559] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:36,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:36,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-21 20:14:36,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929790608] [2021-10-21 20:14:36,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:14:36,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:14:36,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:36,225 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:36,896 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-10-21 20:14:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:36,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-10-21 20:14:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:36,898 INFO L225 Difference]: With dead ends: 85 [2021-10-21 20:14:36,898 INFO L226 Difference]: Without dead ends: 85 [2021-10-21 20:14:36,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:14:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-21 20:14:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-10-21 20:14:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-10-21 20:14:36,906 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 23 [2021-10-21 20:14:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:36,908 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-10-21 20:14:36,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-10-21 20:14:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:14:36,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:36,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:36,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:37,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:37,125 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 486538854, now seen corresponding path program 1 times [2021-10-21 20:14:37,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:37,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21287188] [2021-10-21 20:14:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:37,128 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:37,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:37,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 20:14:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:37,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:14:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:37,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 20:14:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2021-10-21 20:14:37,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-21 20:14:37,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-21 20:14:37,785 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 20:14:37,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:38,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-10-21 20:14:38,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-10-21 20:14:38,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-10-21 20:14:38,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-21 20:14:39,287 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 20:14:39,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:39,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21287188] [2021-10-21 20:14:39,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21287188] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:39,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:39,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-21 20:14:39,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682110075] [2021-10-21 20:14:39,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:14:39,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:14:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:14:39,290 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 20:14:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:40,579 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-10-21 20:14:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-10-21 20:14:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:40,582 INFO L225 Difference]: With dead ends: 87 [2021-10-21 20:14:40,582 INFO L226 Difference]: Without dead ends: 87 [2021-10-21 20:14:40,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:14:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-21 20:14:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-10-21 20:14:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-21 20:14:40,590 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 23 [2021-10-21 20:14:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:40,590 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-21 20:14:40,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 20:14:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-21 20:14:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:14:40,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:40,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:40,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:40,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:40,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash -567430243, now seen corresponding path program 1 times [2021-10-21 20:14:40,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:40,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130724606] [2021-10-21 20:14:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:40,803 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:40,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:40,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:40,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 20:14:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:14:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:41,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-10-21 20:14:41,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-21 20:14:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:41,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:41,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-10-21 20:14:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:41,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130724606] [2021-10-21 20:14:41,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130724606] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:41,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:41,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-10-21 20:14:41,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960408275] [2021-10-21 20:14:41,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:14:41,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:14:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:14:41,686 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:42,035 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-10-21 20:14:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-10-21 20:14:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:42,037 INFO L225 Difference]: With dead ends: 69 [2021-10-21 20:14:42,037 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:14:42,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:14:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 20:14:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 62 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-10-21 20:14:42,044 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 25 [2021-10-21 20:14:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:42,044 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-10-21 20:14:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-10-21 20:14:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:14:42,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:42,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:42,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:42,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:42,257 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:42,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1035621474, now seen corresponding path program 1 times [2021-10-21 20:14:42,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:42,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85568793] [2021-10-21 20:14:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:42,261 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:42,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:42,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-21 20:14:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:42,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:14:42,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:42,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 20:14:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 20:14:42,877 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 20:14:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-21 20:14:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:43,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:43,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85568793] [2021-10-21 20:14:43,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85568793] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:43,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:43,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-21 20:14:43,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131122378] [2021-10-21 20:14:43,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:14:43,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:14:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:14:43,218 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:43,629 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-21 20:14:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:14:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-21 20:14:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:43,631 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:14:43,631 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 20:14:43,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:14:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 20:14:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-21 20:14:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 61 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-10-21 20:14:43,636 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 26 [2021-10-21 20:14:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:43,636 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-10-21 20:14:43,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-10-21 20:14:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:14:43,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:43,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:43,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:43,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:43,848 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr9ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:43,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2039494522, now seen corresponding path program 1 times [2021-10-21 20:14:43,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:43,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453158912] [2021-10-21 20:14:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:43,849 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:43,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:43,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:43,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-21 20:14:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:44,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:14:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 15 [2021-10-21 20:14:44,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-21 20:14:44,768 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 20:14:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:45,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-21 20:14:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:45,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:45,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453158912] [2021-10-21 20:14:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453158912] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:14:45,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:14:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-10-21 20:14:45,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180415789] [2021-10-21 20:14:45,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:14:45,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:14:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:14:45,359 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:14:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:46,048 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-10-21 20:14:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:14:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-10-21 20:14:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:46,050 INFO L225 Difference]: With dead ends: 67 [2021-10-21 20:14:46,051 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 20:14:46,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:14:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 20:14:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-21 20:14:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.4) internal successors, (63), 60 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-10-21 20:14:46,056 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 27 [2021-10-21 20:14:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:46,056 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-10-21 20:14:46,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:14:46,057 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-10-21 20:14:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:14:46,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:46,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:46,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:46,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:46,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1217488631, now seen corresponding path program 1 times [2021-10-21 20:14:46,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:46,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219719529] [2021-10-21 20:14:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:46,274 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:46,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:46,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:46,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-21 20:14:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:46,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:14:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-21 20:14:46,862 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-10-21 20:14:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-10-21 20:14:47,100 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-10-21 20:14:47,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-10-21 20:14:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:47,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:47,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-10-21 20:14:47,936 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-21 20:14:47,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2021-10-21 20:14:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:48,059 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:14:48,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219719529] [2021-10-21 20:14:48,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219719529] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 20:14:48,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:14:48,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-21 20:14:48,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294893935] [2021-10-21 20:14:48,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 20:14:48,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:14:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 20:14:48,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:14:48,063 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:49,693 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-10-21 20:14:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:14:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-10-21 20:14:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:49,695 INFO L225 Difference]: With dead ends: 73 [2021-10-21 20:14:49,695 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 20:14:49,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1049.3ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-10-21 20:14:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 20:14:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-10-21 20:14:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.346938775510204) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:14:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-10-21 20:14:49,701 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 28 [2021-10-21 20:14:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:49,702 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-10-21 20:14:49,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:14:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-10-21 20:14:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:14:49,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:49,704 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:49,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:49,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:14:49,917 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:14:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:49,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1217488630, now seen corresponding path program 1 times [2021-10-21 20:14:49,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:14:49,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508699184] [2021-10-21 20:14:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:49,918 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:14:49,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:14:49,921 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:14:49,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-21 20:14:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:14:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 20:14:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:50,343 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 20:14:50,362 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 20:14:50,575 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 20:14:50,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-10-21 20:14:50,600 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 20:14:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-10-21 20:14:50,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 22 [2021-10-21 20:14:50,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 20:14:51,071 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-21 20:14:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2021-10-21 20:14:51,364 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2021-10-21 20:14:51,405 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 20:14:51,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2021-10-21 20:14:51,758 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:14:51,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 51 [2021-10-21 20:14:51,775 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:14:51,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-10-21 20:14:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:14:51,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:14:53,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-10-21 20:14:53,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2021-10-21 20:14:54,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-10-21 20:15:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:03,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:15:03,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508699184] [2021-10-21 20:15:03,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508699184] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 20:15:03,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:15:03,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-21 20:15:03,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223314532] [2021-10-21 20:15:03,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 20:15:03,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:15:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 20:15:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=258, Unknown=4, NotChecked=0, Total=306 [2021-10-21 20:15:03,638 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 20:15:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:07,827 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-10-21 20:15:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:15:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-21 20:15:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:07,829 INFO L225 Difference]: With dead ends: 72 [2021-10-21 20:15:07,829 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 20:15:07,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 11469.3ms TimeCoverageRelationStatistics Valid=149, Invalid=497, Unknown=4, NotChecked=0, Total=650 [2021-10-21 20:15:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 20:15:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-10-21 20:15:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:15:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-10-21 20:15:07,835 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 28 [2021-10-21 20:15:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:07,836 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-10-21 20:15:07,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 20:15:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-10-21 20:15:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:15:07,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:07,838 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:07,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:08,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:15:08,045 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:15:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1200179360, now seen corresponding path program 1 times [2021-10-21 20:15:08,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:15:08,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570982710] [2021-10-21 20:15:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:08,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:15:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:15:08,048 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:15:08,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-21 20:15:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:08,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:15:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:08,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-21 20:15:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-21 20:15:09,001 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 20:15:09,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:15:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-10-21 20:15:09,422 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-21 20:15:09,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 40 [2021-10-21 20:15:09,537 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 20:15:09,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:15:09,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570982710] [2021-10-21 20:15:09,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570982710] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:15:09,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:15:09,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-21 20:15:09,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320649879] [2021-10-21 20:15:09,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:15:09,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:15:09,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:15:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:15:09,540 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:15:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:10,113 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-10-21 20:15:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:15:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-10-21 20:15:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:10,116 INFO L225 Difference]: With dead ends: 69 [2021-10-21 20:15:10,116 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:15:10,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:15:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 20:15:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:15:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-10-21 20:15:10,120 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 28 [2021-10-21 20:15:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:10,121 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-10-21 20:15:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:15:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-10-21 20:15:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:15:10,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:10,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:10,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:10,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:15:10,337 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:15:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1449145399, now seen corresponding path program 1 times [2021-10-21 20:15:10,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:15:10,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722308278] [2021-10-21 20:15:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:10,339 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:15:10,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:15:10,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:15:10,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-21 20:15:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:10,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:15:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:10,786 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 20:15:10,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2021-10-21 20:15:11,047 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 20:15:11,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-21 20:15:11,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-21 20:15:11,219 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-21 20:15:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-10-21 20:15:11,279 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 20:15:11,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:15:11,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-21 20:15:11,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-10-21 20:15:11,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 20:15:11,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2021-10-21 20:15:12,062 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 20:15:12,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:15:12,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722308278] [2021-10-21 20:15:12,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722308278] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:15:12,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:15:12,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2021-10-21 20:15:12,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237215700] [2021-10-21 20:15:12,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:15:12,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:15:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:15:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:12,064 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:15:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:17,116 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-10-21 20:15:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:15:17,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-10-21 20:15:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:17,118 INFO L225 Difference]: With dead ends: 84 [2021-10-21 20:15:17,118 INFO L226 Difference]: Without dead ends: 84 [2021-10-21 20:15:17,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:15:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-21 20:15:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-10-21 20:15:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:15:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-10-21 20:15:17,123 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 29 [2021-10-21 20:15:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:17,124 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-10-21 20:15:17,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:15:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-10-21 20:15:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:15:17,126 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:17,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:17,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:17,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:15:17,337 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:15:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:17,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1449145398, now seen corresponding path program 1 times [2021-10-21 20:15:17,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:15:17,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401991916] [2021-10-21 20:15:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:17,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:15:17,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:15:17,340 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:15:17,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-21 20:15:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:18,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:15:18,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:18,195 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 20:15:18,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:15:18,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-21 20:15:18,439 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 20:15:18,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:15:18,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401991916] [2021-10-21 20:15:18,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401991916] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:15:18,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:15:18,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-21 20:15:18,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769254316] [2021-10-21 20:15:18,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:15:18,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:15:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:15:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:15:18,442 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:15:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:18,672 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-10-21 20:15:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:15:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-10-21 20:15:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:18,674 INFO L225 Difference]: With dead ends: 63 [2021-10-21 20:15:18,674 INFO L226 Difference]: Without dead ends: 63 [2021-10-21 20:15:18,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:15:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-21 20:15:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-21 20:15:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.183673469387755) internal successors, (58), 56 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:15:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-10-21 20:15:18,679 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 29 [2021-10-21 20:15:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:18,679 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-10-21 20:15:18,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:15:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-10-21 20:15:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 20:15:18,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:18,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:18,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-21 20:15:18,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:15:18,885 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-10-21 20:15:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:18,885 INFO L82 PathProgramCache]: Analyzing trace with hash -102022449, now seen corresponding path program 1 times [2021-10-21 20:15:18,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:15:18,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87874330] [2021-10-21 20:15:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:18,886 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:15:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:15:18,887 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:15:18,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-21 20:15:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:15:19,395 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:15:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:15:19,581 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 20:15:19,581 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:15:19,582 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:15:19,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:15:19,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:15:19,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:15:19,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:15:19,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:15:19,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:15:19,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:15:19,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:15:19,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:15:19,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:15:19,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:15:19,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 20:15:19,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 20:15:19,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 20:15:19,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 20:15:19,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 20:15:19,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 20:15:19,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 20:15:19,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-21 20:15:19,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-21 20:15:19,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-21 20:15:19,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:15:19,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:15:19,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:15:19,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-21 20:15:19,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-21 20:15:19,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-10-21 20:15:19,592 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-10-21 20:15:19,592 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-10-21 20:15:19,592 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-10-21 20:15:19,592 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-10-21 20:15:19,593 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-10-21 20:15:19,593 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-10-21 20:15:19,593 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-10-21 20:15:19,593 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-10-21 20:15:19,594 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-10-21 20:15:19,594 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-10-21 20:15:19,594 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-10-21 20:15:19,594 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-10-21 20:15:19,594 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-10-21 20:15:19,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:19,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:15:19,817 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:15:19,846 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 20:15:19,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:15:19 BoogieIcfgContainer [2021-10-21 20:15:19,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:15:19,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:15:19,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:15:19,881 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:15:19,881 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:14:17" (3/4) ... [2021-10-21 20:15:19,884 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:15:19,884 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:15:19,889 INFO L168 Benchmark]: Toolchain (without parser) took 64393.25 ms. Allocated memory was 75.5 MB in the beginning and 113.2 MB in the end (delta: 37.7 MB). Free memory was 51.8 MB in the beginning and 34.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 54.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:15:19,890 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 41.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:15:19,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.82 ms. Allocated memory is still 75.5 MB. Free memory was 51.7 MB in the beginning and 50.7 MB in the end (delta: 968.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:15:19,891 INFO L168 Benchmark]: Boogie Preprocessor took 109.62 ms. Allocated memory is still 75.5 MB. Free memory was 50.7 MB in the beginning and 47.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:15:19,892 INFO L168 Benchmark]: RCFGBuilder took 987.99 ms. Allocated memory is still 75.5 MB. Free memory was 47.6 MB in the beginning and 40.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:15:19,892 INFO L168 Benchmark]: TraceAbstraction took 62614.22 ms. Allocated memory was 75.5 MB in the beginning and 113.2 MB in the end (delta: 37.7 MB). Free memory was 39.9 MB in the beginning and 34.1 MB in the end (delta: 5.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:15:19,893 INFO L168 Benchmark]: Witness Printer took 3.27 ms. Allocated memory is still 113.2 MB. Free memory is still 34.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:15:19,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 41.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 670.82 ms. Allocated memory is still 75.5 MB. Free memory was 51.7 MB in the beginning and 50.7 MB in the end (delta: 968.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 109.62 ms. Allocated memory is still 75.5 MB. Free memory was 50.7 MB in the beginning and 47.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 987.99 ms. Allocated memory is still 75.5 MB. Free memory was 47.6 MB in the beginning and 40.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 62614.22 ms. Allocated memory was 75.5 MB in the beginning and 113.2 MB in the end (delta: 37.7 MB). Free memory was 39.9 MB in the beginning and 34.1 MB in the end (delta: 5.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.27 ms. Allocated memory is still 113.2 MB. Free memory is still 34.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * 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 - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={31:0}] [L541] CALL append(&list) VAL [plist={31:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={1:0}, plist={31:0}, plist={31:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={1:0}, plist={31:0}, plist={31:0}] [L532] EXPR item->next VAL [item={1:0}, item->next={0:0}, plist={31:0}, plist={31:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={5:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={5:0}, plist={31:0}, plist={31:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={5:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={5:0}, plist={31:0}, plist={31:0}] [L535] *plist = item VAL [item={1:0}, plist={31:0}, plist={31:0}] [L541] RET append(&list) VAL [list={31:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={1:0}, list={31:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={1:0}, list={31:0}] [L544] EXPR list->next VAL [\read(*list)={1:0}, list={31:0}, list->next={0:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={31:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={31:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 112 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 62491.6ms, OverallIterations: 17, TraceHistogramMax: 2, EmptinessCheckTime: 28.8ms, AutomataDifference: 28008.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 773 SDtfs, 852 SDslu, 2168 SDs, 0 SdLazy, 2359 SolverSat, 148 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 23395.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 681 GetRequests, 524 SyntacticMatches, 12 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 16214.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=0, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 137.1ms AutomataMinimizationTime, 16 MinimizatonAttempts, 64 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 175.9ms SsaConstructionTime, 1163.4ms SatisfiabilityAnalysisTime, 25347.6ms InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 622 ConstructedInterpolants, 47 QuantifiedInterpolants, 6231 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2049 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 32 InterpolantComputations, 28 PerfectInterpolantSequences, 8/28 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 20:15:19,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa21174a-c8d4-4efe-8fb9-704188be0c49/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...