./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU --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 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:21:31,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:21:31,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:21:31,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:21:31,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:21:31,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:21:31,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:21:31,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:21:31,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:21:31,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:21:31,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:21:31,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:21:31,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:21:31,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:21:31,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:21:31,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:21:31,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:21:31,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:21:31,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:21:31,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:21:31,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:21:31,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:21:31,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:21:31,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:21:31,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:21:31,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:21:31,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:21:31,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:21:31,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:21:31,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:21:31,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:21:31,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:21:31,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:21:31,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:21:31,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:21:31,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:21:31,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:21:31,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:21:31,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:21:31,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:21:31,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:21:31,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:21:31,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:21:31,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:21:31,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:21:31,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:21:31,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:21:31,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:21:31,379 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:21:31,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:21:31,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:21:31,380 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:21:31,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:21:31,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:21:31,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:21:31,382 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:21:31,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:21:31,383 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:21:31,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:21:31,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:21:31,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:21:31,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:21:31,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:21:31,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:21:31,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:21:31,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:21:31,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:21:31,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:21:31,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:21:31,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:21:31,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:21:31,388 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_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b [2021-11-02 22:21:31,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:21:31,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:21:31,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:21:31,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:21:31,722 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:21:31,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-11-02 22:21:31,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/aa8b11222/5e7473665c514f6bb5472b942dbce1b6/FLAG268688d17 [2021-11-02 22:21:32,373 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:21:32,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-11-02 22:21:32,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/aa8b11222/5e7473665c514f6bb5472b942dbce1b6/FLAG268688d17 [2021-11-02 22:21:32,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/aa8b11222/5e7473665c514f6bb5472b942dbce1b6 [2021-11-02 22:21:32,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:21:32,660 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:21:32,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:21:32,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:21:32,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:21:32,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:21:32" (1/1) ... [2021-11-02 22:21:32,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552cf106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:32, skipping insertion in model container [2021-11-02 22:21:32,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:21:32" (1/1) ... [2021-11-02 22:21:32,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:21:32,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:21:33,080 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-11-02 22:21:33,084 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-11-02 22:21:33,085 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-11-02 22:21:33,087 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-11-02 22:21:33,088 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-11-02 22:21:33,089 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-11-02 22:21:33,090 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-11-02 22:21:33,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:21:33,105 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:21:33,144 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-11-02 22:21:33,145 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-11-02 22:21:33,146 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-11-02 22:21:33,147 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-11-02 22:21:33,148 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-11-02 22:21:33,150 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-11-02 22:21:33,151 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-11-02 22:21:33,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:21:33,188 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:21:33,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33 WrapperNode [2021-11-02 22:21:33,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:21:33,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:21:33,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:21:33,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:21:33,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:21:33,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:21:33,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:21:33,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:21:33,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (1/1) ... [2021-11-02 22:21:33,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:21:33,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:33,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:21:33,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:21:33,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:21:33,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:21:33,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:21:33,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:21:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:21:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:21:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:21:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:21:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:21:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:21:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:21:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:21:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:21:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:21:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:21:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:21:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:21:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:21:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:21:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:21:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:21:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:21:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:21:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:21:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:21:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:21:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:21:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:21:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:21:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:21:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:21:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:21:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:21:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:21:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:21:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:21:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:21:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:21:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:21:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:21:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:21:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:21:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:21:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:21:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:21:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:21:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:21:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:21:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:21:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:21:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:21:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:21:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:21:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:21:33,403 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:21:33,403 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:21:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:21:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:21:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:21:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:21:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:21:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:21:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:21:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:21:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:21:33,407 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:21:33,407 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:21:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:21:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:21:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:21:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:21:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:21:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:21:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:21:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:21:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:21:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:21:33,410 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:21:33,410 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:21:33,410 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:21:33,410 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:21:33,410 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:21:33,410 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:21:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:21:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:21:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:21:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:21:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:21:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:21:33,412 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:21:33,412 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:21:33,412 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:21:33,412 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:21:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:21:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:21:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:21:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:21:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:21:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:21:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:21:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:21:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:21:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:21:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:21:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:21:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:21:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:21:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:21:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:21:33,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:21:33,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:21:33,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:21:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:21:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:21:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:21:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:21:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:21:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:21:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:21:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:21:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:21:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:21:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:21:34,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:21:34,264 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 22:21:34,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:21:34 BoogieIcfgContainer [2021-11-02 22:21:34,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:21:34,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:21:34,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:21:34,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:21:34,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:21:32" (1/3) ... [2021-11-02 22:21:34,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7342ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:21:34, skipping insertion in model container [2021-11-02 22:21:34,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:33" (2/3) ... [2021-11-02 22:21:34,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7342ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:21:34, skipping insertion in model container [2021-11-02 22:21:34,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:21:34" (3/3) ... [2021-11-02 22:21:34,276 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2021-11-02 22:21:34,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:21:34,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2021-11-02 22:21:34,339 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:21:34,361 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 [2021-11-02 22:21:34,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2021-11-02 22:21:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 176 states, 91 states have (on average 2.208791208791209) internal successors, (201), 171 states have internal predecessors, (201), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:21:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:21:34,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:34,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:34,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1606277154, now seen corresponding path program 1 times [2021-11-02 22:21:34,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:34,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546383561] [2021-11-02 22:21:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:34,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:34,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:34,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:34,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546383561] [2021-11-02 22:21:34,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546383561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:34,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:34,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:34,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688998011] [2021-11-02 22:21:34,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:34,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:34,776 INFO L87 Difference]: Start difference. First operand has 176 states, 91 states have (on average 2.208791208791209) internal successors, (201), 171 states have internal predecessors, (201), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-02 22:21:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:35,226 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2021-11-02 22:21:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-02 22:21:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:35,246 INFO L225 Difference]: With dead ends: 203 [2021-11-02 22:21:35,246 INFO L226 Difference]: Without dead ends: 200 [2021-11-02 22:21:35,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-02 22:21:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 174. [2021-11-02 22:21:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 94 states have (on average 1.9042553191489362) internal successors, (179), 170 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 182 transitions. [2021-11-02 22:21:35,331 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 182 transitions. Word has length 7 [2021-11-02 22:21:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:35,331 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 182 transitions. [2021-11-02 22:21:35,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-02 22:21:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 182 transitions. [2021-11-02 22:21:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:21:35,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:35,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:35,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:21:35,333 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1606277155, now seen corresponding path program 1 times [2021-11-02 22:21:35,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:35,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582707841] [2021-11-02 22:21:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:35,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:35,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:35,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:35,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582707841] [2021-11-02 22:21:35,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582707841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:35,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:35,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:35,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130408321] [2021-11-02 22:21:35,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:35,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:35,447 INFO L87 Difference]: Start difference. First operand 174 states and 182 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-02 22:21:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:35,778 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2021-11-02 22:21:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-02 22:21:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:35,783 INFO L225 Difference]: With dead ends: 170 [2021-11-02 22:21:35,783 INFO L226 Difference]: Without dead ends: 170 [2021-11-02 22:21:35,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-02 22:21:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-02 22:21:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 94 states have (on average 1.851063829787234) internal successors, (174), 166 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2021-11-02 22:21:35,804 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 7 [2021-11-02 22:21:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:35,805 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2021-11-02 22:21:35,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-02 22:21:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2021-11-02 22:21:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:21:35,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:35,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:35,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:21:35,807 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash 518588134, now seen corresponding path program 1 times [2021-11-02 22:21:35,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:35,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924637683] [2021-11-02 22:21:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:35,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:35,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:35,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924637683] [2021-11-02 22:21:35,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924637683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:35,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:35,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:35,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983406481] [2021-11-02 22:21:35,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:35,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:35,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:35,963 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:21:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:36,272 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2021-11-02 22:21:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:36,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-11-02 22:21:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:36,275 INFO L225 Difference]: With dead ends: 166 [2021-11-02 22:21:36,275 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 22:21:36,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 22:21:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-11-02 22:21:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 95 states have (on average 1.7789473684210526) internal successors, (169), 160 states have internal predecessors, (169), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2021-11-02 22:21:36,296 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 11 [2021-11-02 22:21:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:36,297 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2021-11-02 22:21:36,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:21:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2021-11-02 22:21:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:21:36,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:36,298 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:36,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:21:36,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:36,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:36,300 INFO L85 PathProgramCache]: Analyzing trace with hash 518588135, now seen corresponding path program 1 times [2021-11-02 22:21:36,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:36,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837009351] [2021-11-02 22:21:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:36,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:36,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:36,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837009351] [2021-11-02 22:21:36,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837009351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:36,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:36,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:36,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326230655] [2021-11-02 22:21:36,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:36,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:36,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:36,442 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:21:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:36,702 INFO L93 Difference]: Finished difference Result 181 states and 187 transitions. [2021-11-02 22:21:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:36,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-11-02 22:21:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:36,704 INFO L225 Difference]: With dead ends: 181 [2021-11-02 22:21:36,705 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 22:21:36,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 22:21:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2021-11-02 22:21:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 102 states have (on average 1.696078431372549) internal successors, (173), 164 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2021-11-02 22:21:36,726 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 11 [2021-11-02 22:21:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:36,727 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2021-11-02 22:21:36,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:21:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2021-11-02 22:21:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:21:36,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:36,729 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:36,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:21:36,729 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1815811023, now seen corresponding path program 1 times [2021-11-02 22:21:36,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:36,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686797764] [2021-11-02 22:21:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:36,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:36,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:36,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:36,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686797764] [2021-11-02 22:21:36,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686797764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:36,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:36,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:21:36,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46306702] [2021-11-02 22:21:36,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:21:36,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:21:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:21:36,892 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:37,174 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2021-11-02 22:21:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:21:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:21:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:37,175 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:21:37,175 INFO L226 Difference]: Without dead ends: 168 [2021-11-02 22:21:37,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-02 22:21:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 155. [2021-11-02 22:21:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 104 states have (on average 1.5576923076923077) internal successors, (162), 151 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 165 transitions. [2021-11-02 22:21:37,182 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 165 transitions. Word has length 17 [2021-11-02 22:21:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:37,182 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 165 transitions. [2021-11-02 22:21:37,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 165 transitions. [2021-11-02 22:21:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:21:37,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:37,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:37,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:21:37,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1815811024, now seen corresponding path program 1 times [2021-11-02 22:21:37,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:37,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727728235] [2021-11-02 22:21:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:37,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:37,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:37,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:37,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727728235] [2021-11-02 22:21:37,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727728235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:37,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:37,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:21:37,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114571066] [2021-11-02 22:21:37,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:21:37,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:21:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:21:37,335 INFO L87 Difference]: Start difference. First operand 155 states and 165 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:37,653 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2021-11-02 22:21:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:21:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:21:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:37,655 INFO L225 Difference]: With dead ends: 197 [2021-11-02 22:21:37,655 INFO L226 Difference]: Without dead ends: 197 [2021-11-02 22:21:37,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-02 22:21:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 165. [2021-11-02 22:21:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 115 states have (on average 1.5217391304347827) internal successors, (175), 161 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-11-02 22:21:37,661 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 17 [2021-11-02 22:21:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:37,661 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-11-02 22:21:37,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-11-02 22:21:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:21:37,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:37,662 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:37,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:21:37,662 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:37,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1237724066, now seen corresponding path program 1 times [2021-11-02 22:21:37,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:37,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748034150] [2021-11-02 22:21:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:37,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:37,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:37,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:37,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748034150] [2021-11-02 22:21:37,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748034150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:37,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:37,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:21:37,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297173713] [2021-11-02 22:21:37,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:37,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:37,765 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:38,084 INFO L93 Difference]: Finished difference Result 206 states and 216 transitions. [2021-11-02 22:21:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:21:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-02 22:21:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:38,088 INFO L225 Difference]: With dead ends: 206 [2021-11-02 22:21:38,088 INFO L226 Difference]: Without dead ends: 206 [2021-11-02 22:21:38,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-02 22:21:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 166. [2021-11-02 22:21:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 117 states have (on average 1.5042735042735043) internal successors, (176), 162 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2021-11-02 22:21:38,095 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 19 [2021-11-02 22:21:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:38,095 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2021-11-02 22:21:38,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2021-11-02 22:21:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:21:38,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:38,097 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:38,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:21:38,097 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash -286893983, now seen corresponding path program 1 times [2021-11-02 22:21:38,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:38,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784928647] [2021-11-02 22:21:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:38,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:38,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:38,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:38,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784928647] [2021-11-02 22:21:38,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784928647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:38,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:38,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:21:38,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486051141] [2021-11-02 22:21:38,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:38,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:38,168 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:38,433 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-02 22:21:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-02 22:21:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:38,434 INFO L225 Difference]: With dead ends: 165 [2021-11-02 22:21:38,435 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 22:21:38,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 22:21:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-02 22:21:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 117 states have (on average 1.4871794871794872) internal successors, (174), 161 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2021-11-02 22:21:38,440 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 20 [2021-11-02 22:21:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:38,440 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2021-11-02 22:21:38,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2021-11-02 22:21:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:21:38,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:38,441 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:38,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:21:38,442 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash -286893982, now seen corresponding path program 1 times [2021-11-02 22:21:38,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:38,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467452362] [2021-11-02 22:21:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:38,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:38,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:38,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467452362] [2021-11-02 22:21:38,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467452362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:38,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:21:38,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412629466] [2021-11-02 22:21:38,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:38,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:38,550 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:38,849 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2021-11-02 22:21:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:21:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-02 22:21:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:38,851 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:21:38,851 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 22:21:38,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 22:21:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-02 22:21:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 117 states have (on average 1.4700854700854702) internal successors, (172), 160 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 175 transitions. [2021-11-02 22:21:38,856 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 175 transitions. Word has length 20 [2021-11-02 22:21:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:38,856 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 175 transitions. [2021-11-02 22:21:38,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 175 transitions. [2021-11-02 22:21:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:21:38,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:38,857 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:38,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:21:38,857 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash 747489610, now seen corresponding path program 1 times [2021-11-02 22:21:38,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:38,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124123629] [2021-11-02 22:21:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:38,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:39,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:39,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:39,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124123629] [2021-11-02 22:21:39,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124123629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:39,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:39,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:21:39,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319033575] [2021-11-02 22:21:39,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:21:39,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:39,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:21:39,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:21:39,053 INFO L87 Difference]: Start difference. First operand 164 states and 175 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:39,488 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2021-11-02 22:21:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:21:39,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 22:21:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:39,490 INFO L225 Difference]: With dead ends: 218 [2021-11-02 22:21:39,490 INFO L226 Difference]: Without dead ends: 218 [2021-11-02 22:21:39,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:21:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-02 22:21:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2021-11-02 22:21:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 122 states have (on average 1.4508196721311475) internal successors, (177), 165 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 180 transitions. [2021-11-02 22:21:39,510 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 180 transitions. Word has length 22 [2021-11-02 22:21:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:39,511 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 180 transitions. [2021-11-02 22:21:39,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 180 transitions. [2021-11-02 22:21:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:21:39,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:39,513 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:39,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:21:39,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash -379934429, now seen corresponding path program 1 times [2021-11-02 22:21:39,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:39,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193471040] [2021-11-02 22:21:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:39,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:39,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:39,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:39,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193471040] [2021-11-02 22:21:39,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193471040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:39,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:39,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:21:39,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110103266] [2021-11-02 22:21:39,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:21:39,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:21:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:39,661 INFO L87 Difference]: Start difference. First operand 169 states and 180 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:40,107 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-11-02 22:21:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:21:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 22:21:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:40,109 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:21:40,109 INFO L226 Difference]: Without dead ends: 168 [2021-11-02 22:21:40,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:21:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-02 22:21:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-02 22:21:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 122 states have (on average 1.4426229508196722) internal successors, (176), 164 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 179 transitions. [2021-11-02 22:21:40,114 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 179 transitions. Word has length 24 [2021-11-02 22:21:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:40,114 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 179 transitions. [2021-11-02 22:21:40,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 179 transitions. [2021-11-02 22:21:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:21:40,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:40,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:40,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:21:40,116 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -379934428, now seen corresponding path program 1 times [2021-11-02 22:21:40,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:40,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121085733] [2021-11-02 22:21:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:40,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:40,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:40,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:40,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121085733] [2021-11-02 22:21:40,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121085733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:40,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:40,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:21:40,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469898349] [2021-11-02 22:21:40,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:21:40,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:21:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:21:40,357 INFO L87 Difference]: Start difference. First operand 168 states and 179 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:41,165 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2021-11-02 22:21:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:21:41,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 22:21:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:41,166 INFO L225 Difference]: With dead ends: 186 [2021-11-02 22:21:41,167 INFO L226 Difference]: Without dead ends: 186 [2021-11-02 22:21:41,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:21:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-02 22:21:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2021-11-02 22:21:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 132 states have (on average 1.393939393939394) internal successors, (184), 168 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2021-11-02 22:21:41,175 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 24 [2021-11-02 22:21:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:41,175 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2021-11-02 22:21:41,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2021-11-02 22:21:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:21:41,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:41,181 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-02 22:21:41,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:21:41,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:41,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1999955632, now seen corresponding path program 1 times [2021-11-02 22:21:41,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:41,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993943447] [2021-11-02 22:21:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:41,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:41,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:41,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:41,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993943447] [2021-11-02 22:21:41,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993943447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:41,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135027502] [2021-11-02 22:21:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:41,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:41,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:41,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:41,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:21:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:21:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:41,563 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 [2021-11-02 22:21:41,680 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:21:41,681 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 12 treesize of output 14 [2021-11-02 22:21:41,741 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 [2021-11-02 22:21:41,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-02 22:21:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:41,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-02 22:21:42,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:21:42,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2021-11-02 22:21:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:42,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135027502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:42,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:42,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-11-02 22:21:42,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582189185] [2021-11-02 22:21:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:21:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:21:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:21:42,415 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2021-11-02 22:21:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:43,992 INFO L93 Difference]: Finished difference Result 234 states and 252 transitions. [2021-11-02 22:21:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:21:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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 29 [2021-11-02 22:21:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:43,995 INFO L225 Difference]: With dead ends: 234 [2021-11-02 22:21:43,995 INFO L226 Difference]: Without dead ends: 234 [2021-11-02 22:21:43,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:21:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-02 22:21:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 179. [2021-11-02 22:21:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 139 states have (on average 1.381294964028777) internal successors, (192), 175 states have internal predecessors, (192), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 195 transitions. [2021-11-02 22:21:44,001 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 195 transitions. Word has length 29 [2021-11-02 22:21:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:44,002 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 195 transitions. [2021-11-02 22:21:44,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2021-11-02 22:21:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 195 transitions. [2021-11-02 22:21:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:21:44,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:44,003 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:44,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:44,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:21:44,219 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:44,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2041973885, now seen corresponding path program 1 times [2021-11-02 22:21:44,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:44,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226508550] [2021-11-02 22:21:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:44,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:44,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:44,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:44,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226508550] [2021-11-02 22:21:44,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226508550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:44,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:44,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:21:44,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302649371] [2021-11-02 22:21:44,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:44,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:44,339 INFO L87 Difference]: Start difference. First operand 179 states and 195 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-02 22:21:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:44,630 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2021-11-02 22:21:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:21:44,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 29 [2021-11-02 22:21:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:44,632 INFO L225 Difference]: With dead ends: 183 [2021-11-02 22:21:44,632 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 22:21:44,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:21:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 22:21:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 178. [2021-11-02 22:21:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 138 states have (on average 1.3695652173913044) internal successors, (189), 174 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 192 transitions. [2021-11-02 22:21:44,637 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 192 transitions. Word has length 29 [2021-11-02 22:21:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:44,637 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 192 transitions. [2021-11-02 22:21:44,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-02 22:21:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 192 transitions. [2021-11-02 22:21:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:21:44,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:44,639 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:44,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:21:44,639 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr40ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1744704903, now seen corresponding path program 1 times [2021-11-02 22:21:44,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:44,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187733768] [2021-11-02 22:21:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:44,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:44,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:44,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:44,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187733768] [2021-11-02 22:21:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187733768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:44,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:44,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:21:44,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211021388] [2021-11-02 22:21:44,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:21:44,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:21:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:21:44,706 INFO L87 Difference]: Start difference. First operand 178 states and 192 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-02 22:21:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:44,923 INFO L93 Difference]: Finished difference Result 180 states and 193 transitions. [2021-11-02 22:21:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:21:44,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 30 [2021-11-02 22:21:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:44,925 INFO L225 Difference]: With dead ends: 180 [2021-11-02 22:21:44,925 INFO L226 Difference]: Without dead ends: 180 [2021-11-02 22:21:44,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-02 22:21:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2021-11-02 22:21:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 172 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 189 transitions. [2021-11-02 22:21:44,930 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 189 transitions. Word has length 30 [2021-11-02 22:21:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:44,930 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 189 transitions. [2021-11-02 22:21:44,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-02 22:21:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 189 transitions. [2021-11-02 22:21:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:21:44,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:44,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:44,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:21:44,931 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1885887701, now seen corresponding path program 1 times [2021-11-02 22:21:44,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:44,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830367357] [2021-11-02 22:21:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:44,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:45,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:45,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:45,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830367357] [2021-11-02 22:21:45,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830367357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:45,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:45,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:21:45,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141745822] [2021-11-02 22:21:45,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:45,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:45,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:45,014 INFO L87 Difference]: Start difference. First operand 176 states and 189 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-02 22:21:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:45,280 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2021-11-02 22:21:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:21:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 32 [2021-11-02 22:21:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:45,282 INFO L225 Difference]: With dead ends: 175 [2021-11-02 22:21:45,282 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 22:21:45,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 22:21:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-02 22:21:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 137 states have (on average 1.3503649635036497) internal successors, (185), 171 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 188 transitions. [2021-11-02 22:21:45,287 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 188 transitions. Word has length 32 [2021-11-02 22:21:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:45,288 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 188 transitions. [2021-11-02 22:21:45,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-02 22:21:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 188 transitions. [2021-11-02 22:21:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:21:45,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:45,289 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:45,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:21:45,289 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1885887700, now seen corresponding path program 1 times [2021-11-02 22:21:45,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:45,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069476837] [2021-11-02 22:21:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:45,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:45,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:45,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:45,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069476837] [2021-11-02 22:21:45,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069476837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:45,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:45,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:21:45,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61122733] [2021-11-02 22:21:45,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:45,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:45,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:45,361 INFO L87 Difference]: Start difference. First operand 175 states and 188 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-02 22:21:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:45,624 INFO L93 Difference]: Finished difference Result 174 states and 187 transitions. [2021-11-02 22:21:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 32 [2021-11-02 22:21:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:45,626 INFO L225 Difference]: With dead ends: 174 [2021-11-02 22:21:45,626 INFO L226 Difference]: Without dead ends: 174 [2021-11-02 22:21:45,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-02 22:21:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-02 22:21:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 170 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 187 transitions. [2021-11-02 22:21:45,630 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 187 transitions. Word has length 32 [2021-11-02 22:21:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:45,631 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 187 transitions. [2021-11-02 22:21:45,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-11-02 22:21:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 187 transitions. [2021-11-02 22:21:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:21:45,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:45,632 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:45,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:21:45,632 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:45,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1186433942, now seen corresponding path program 1 times [2021-11-02 22:21:45,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:45,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124045979] [2021-11-02 22:21:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:45,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:45,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:45,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:45,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124045979] [2021-11-02 22:21:45,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124045979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:45,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:45,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:21:45,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936032992] [2021-11-02 22:21:45,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:21:45,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:21:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:21:45,742 INFO L87 Difference]: Start difference. First operand 174 states and 187 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-11-02 22:21:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:45,970 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2021-11-02 22:21:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:21:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 33 [2021-11-02 22:21:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:45,972 INFO L225 Difference]: With dead ends: 173 [2021-11-02 22:21:45,972 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 22:21:45,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 22:21:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-11-02 22:21:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 136 states have (on average 1.3308823529411764) internal successors, (181), 168 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2021-11-02 22:21:45,977 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 33 [2021-11-02 22:21:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:45,977 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2021-11-02 22:21:45,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-11-02 22:21:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2021-11-02 22:21:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:21:45,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:45,978 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:45,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:21:45,978 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr74ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -928549615, now seen corresponding path program 1 times [2021-11-02 22:21:45,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:45,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043059894] [2021-11-02 22:21:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:45,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:21:46,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:46,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043059894] [2021-11-02 22:21:46,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043059894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:46,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:46,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:46,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316208838] [2021-11-02 22:21:46,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:46,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:46,031 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-02 22:21:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:46,216 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2021-11-02 22:21:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:46,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2021-11-02 22:21:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:46,218 INFO L225 Difference]: With dead ends: 173 [2021-11-02 22:21:46,218 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 22:21:46,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 22:21:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-02 22:21:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 137 states have (on average 1.3211678832116789) internal successors, (181), 169 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 184 transitions. [2021-11-02 22:21:46,222 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 184 transitions. Word has length 35 [2021-11-02 22:21:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:46,223 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 184 transitions. [2021-11-02 22:21:46,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-02 22:21:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 184 transitions. [2021-11-02 22:21:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:21:46,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:46,224 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:46,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:21:46,225 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1996554546, now seen corresponding path program 1 times [2021-11-02 22:21:46,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:46,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341216064] [2021-11-02 22:21:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:46,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:46,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:46,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:46,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341216064] [2021-11-02 22:21:46,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341216064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:46,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:46,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-02 22:21:46,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429929065] [2021-11-02 22:21:46,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:21:46,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:21:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:21:46,410 INFO L87 Difference]: Start difference. First operand 173 states and 184 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-11-02 22:21:47,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:47,096 INFO L93 Difference]: Finished difference Result 207 states and 217 transitions. [2021-11-02 22:21:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:21:47,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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 35 [2021-11-02 22:21:47,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:47,098 INFO L225 Difference]: With dead ends: 207 [2021-11-02 22:21:47,098 INFO L226 Difference]: Without dead ends: 207 [2021-11-02 22:21:47,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:21:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-02 22:21:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2021-11-02 22:21:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 137 states have (on average 1.313868613138686) internal successors, (180), 169 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 183 transitions. [2021-11-02 22:21:47,103 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 183 transitions. Word has length 35 [2021-11-02 22:21:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:47,104 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 183 transitions. [2021-11-02 22:21:47,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-11-02 22:21:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 183 transitions. [2021-11-02 22:21:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:21:47,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:47,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:47,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:21:47,105 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:47,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash 412994518, now seen corresponding path program 1 times [2021-11-02 22:21:47,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:47,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512018950] [2021-11-02 22:21:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:47,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:47,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:47,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512018950] [2021-11-02 22:21:47,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512018950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:47,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:47,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:21:47,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459499500] [2021-11-02 22:21:47,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:21:47,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:21:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:21:47,232 INFO L87 Difference]: Start difference. First operand 173 states and 183 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-11-02 22:21:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:47,600 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2021-11-02 22:21:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:21:47,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 36 [2021-11-02 22:21:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:47,606 INFO L225 Difference]: With dead ends: 173 [2021-11-02 22:21:47,606 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 22:21:47,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:21:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 22:21:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-11-02 22:21:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 137 states have (on average 1.3065693430656935) internal successors, (179), 168 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 182 transitions. [2021-11-02 22:21:47,612 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 182 transitions. Word has length 36 [2021-11-02 22:21:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:47,613 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 182 transitions. [2021-11-02 22:21:47,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-11-02 22:21:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 182 transitions. [2021-11-02 22:21:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:21:47,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:47,614 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:47,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:21:47,614 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 412994519, now seen corresponding path program 1 times [2021-11-02 22:21:47,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:47,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007459950] [2021-11-02 22:21:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:47,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:47,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:47,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007459950] [2021-11-02 22:21:47,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007459950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:47,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:47,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:21:47,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209266725] [2021-11-02 22:21:47,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:21:47,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:21:47,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:47,817 INFO L87 Difference]: Start difference. First operand 172 states and 182 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-11-02 22:21:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:48,405 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2021-11-02 22:21:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:21:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 36 [2021-11-02 22:21:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:48,409 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:21:48,410 INFO L226 Difference]: Without dead ends: 168 [2021-11-02 22:21:48,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:21:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-02 22:21:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2021-11-02 22:21:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 128 states have (on average 1.265625) internal successors, (162), 152 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2021-11-02 22:21:48,415 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 36 [2021-11-02 22:21:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:48,415 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2021-11-02 22:21:48,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-11-02 22:21:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2021-11-02 22:21:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:21:48,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:48,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:48,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:21:48,417 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr66REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1979019618, now seen corresponding path program 1 times [2021-11-02 22:21:48,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:48,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980088959] [2021-11-02 22:21:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:48,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:48,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:48,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980088959] [2021-11-02 22:21:48,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980088959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:48,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508362137] [2021-11-02 22:21:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:48,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:48,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:48,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:21:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:48,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:21:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:48,747 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 13 treesize of output 9 [2021-11-02 22:21:48,805 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 19 treesize of output 7 [2021-11-02 22:21:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:21:48,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508362137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:48,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:48,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2021-11-02 22:21:48,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48216140] [2021-11-02 22:21:48,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:48,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:48,831 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-11-02 22:21:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:48,908 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2021-11-02 22:21:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 37 [2021-11-02 22:21:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:48,910 INFO L225 Difference]: With dead ends: 165 [2021-11-02 22:21:48,910 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 22:21:48,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:21:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 22:21:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2021-11-02 22:21:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 131 states have (on average 1.2595419847328244) internal successors, (165), 155 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 168 transitions. [2021-11-02 22:21:48,915 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 168 transitions. Word has length 37 [2021-11-02 22:21:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:48,915 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 168 transitions. [2021-11-02 22:21:48,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-11-02 22:21:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 168 transitions. [2021-11-02 22:21:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:21:48,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:48,918 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-11-02 22:21:48,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:49,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:21:49,143 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1463102527, now seen corresponding path program 1 times [2021-11-02 22:21:49,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:49,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759702455] [2021-11-02 22:21:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:49,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:49,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:49,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759702455] [2021-11-02 22:21:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759702455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363985998] [2021-11-02 22:21:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:49,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:49,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:49,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:21:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:21:49,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:49,534 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 [2021-11-02 22:21:49,539 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 [2021-11-02 22:21:49,560 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:21:49,570 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 22:21:49,570 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 29 treesize of output 33 [2021-11-02 22:21:49,579 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:21:49,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:49,585 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 20 [2021-11-02 22:21:49,636 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-02 22:21:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 23 [2021-11-02 22:21:49,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:49,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:49,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:49,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-02 22:21:50,015 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 22:21:50,015 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 47 treesize of output 33 [2021-11-02 22:21:50,028 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 22:21:50,028 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 27 treesize of output 13 [2021-11-02 22:21:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:21:50,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363985998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:50,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:50,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-11-02 22:21:50,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824358507] [2021-11-02 22:21:50,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:21:50,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:21:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:21:50,071 INFO L87 Difference]: Start difference. First operand 159 states and 168 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 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) [2021-11-02 22:21:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:50,404 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2021-11-02 22:21:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:21:50,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 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 38 [2021-11-02 22:21:50,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:50,406 INFO L225 Difference]: With dead ends: 172 [2021-11-02 22:21:50,406 INFO L226 Difference]: Without dead ends: 172 [2021-11-02 22:21:50,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:21:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-02 22:21:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2021-11-02 22:21:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 161 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 174 transitions. [2021-11-02 22:21:50,411 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 174 transitions. Word has length 38 [2021-11-02 22:21:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:50,412 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 174 transitions. [2021-11-02 22:21:50,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 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) [2021-11-02 22:21:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 174 transitions. [2021-11-02 22:21:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:21:50,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:50,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:50,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-02 22:21:50,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:50,627 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr77ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1888462229, now seen corresponding path program 1 times [2021-11-02 22:21:50,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:50,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501475440] [2021-11-02 22:21:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:50,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:50,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:21:50,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:50,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501475440] [2021-11-02 22:21:50,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501475440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:50,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:50,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:50,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469998849] [2021-11-02 22:21:50,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:50,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:50,677 INFO L87 Difference]: Start difference. First operand 165 states and 174 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-02 22:21:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:50,818 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-11-02 22:21:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 39 [2021-11-02 22:21:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:50,820 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:21:50,820 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 22:21:50,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 22:21:50,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-02 22:21:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 137 states have (on average 1.2335766423357664) internal successors, (169), 160 states have internal predecessors, (169), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2021-11-02 22:21:50,831 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 39 [2021-11-02 22:21:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:50,831 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2021-11-02 22:21:50,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-02 22:21:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2021-11-02 22:21:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:21:50,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:50,833 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:50,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:21:50,833 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr79ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1958975118, now seen corresponding path program 1 times [2021-11-02 22:21:50,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:50,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169057106] [2021-11-02 22:21:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:50,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:51,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:21:51,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:51,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169057106] [2021-11-02 22:21:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169057106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:51,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677012345] [2021-11-02 22:21:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:51,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:51,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:51,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:21:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:51,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:21:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:21:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677012345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:52,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:52,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-02 22:21:52,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058424838] [2021-11-02 22:21:52,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:21:52,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:21:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:21:52,096 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand has 14 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 1 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) [2021-11-02 22:21:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:52,776 INFO L93 Difference]: Finished difference Result 168 states and 175 transitions. [2021-11-02 22:21:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:21:52,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 1 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 41 [2021-11-02 22:21:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:52,777 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:21:52,777 INFO L226 Difference]: Without dead ends: 143 [2021-11-02 22:21:52,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:21:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-02 22:21:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-02 22:21:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 116 states have (on average 1.2672413793103448) internal successors, (147), 139 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2021-11-02 22:21:52,782 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 41 [2021-11-02 22:21:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:52,782 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2021-11-02 22:21:52,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 1 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) [2021-11-02 22:21:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2021-11-02 22:21:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:21:52,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:52,784 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:52,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:52,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:21:52,999 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1052942342, now seen corresponding path program 1 times [2021-11-02 22:21:53,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:53,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438607071] [2021-11-02 22:21:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:53,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:53,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:53,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:53,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438607071] [2021-11-02 22:21:53,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438607071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869340142] [2021-11-02 22:21:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:53,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:53,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:53,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:21:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:53,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:21:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:53,860 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 [2021-11-02 22:21:53,885 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 13 treesize of output 9 [2021-11-02 22:21:53,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:21:53,986 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 11 treesize of output 11 [2021-11-02 22:21:54,044 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 [2021-11-02 22:21:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 22:21:54,201 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:21:54,202 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-02 22:21:54,224 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-02 22:21:54,224 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 62 treesize of output 34 [2021-11-02 22:21:54,314 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:21:54,315 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-02 22:21:54,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:21:54,426 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 22:21:54,426 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 27 treesize of output 26 [2021-11-02 22:21:54,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.base, main_~end~0.offset] [2021-11-02 22:21:54,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:54,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:21:54,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759672928] [2021-11-02 22:21:54,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:21:54,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:54,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:21:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:21:54,734 INFO L87 Difference]: Start difference. First operand 143 states and 150 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 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) [2021-11-02 22:21:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:55,562 INFO L93 Difference]: Finished difference Result 226 states and 238 transitions. [2021-11-02 22:21:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:21:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 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 43 [2021-11-02 22:21:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:55,564 INFO L225 Difference]: With dead ends: 226 [2021-11-02 22:21:55,564 INFO L226 Difference]: Without dead ends: 226 [2021-11-02 22:21:55,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:21:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-02 22:21:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 169. [2021-11-02 22:21:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.232394366197183) internal successors, (175), 165 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2021-11-02 22:21:55,570 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 43 [2021-11-02 22:21:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:55,570 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2021-11-02 22:21:55,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 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) [2021-11-02 22:21:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2021-11-02 22:21:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:21:55,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:55,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:55,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 22:21:55,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:21:55,787 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:55,788 INFO L85 PathProgramCache]: Analyzing trace with hash 445531641, now seen corresponding path program 1 times [2021-11-02 22:21:55,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:55,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416948751] [2021-11-02 22:21:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:55,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:55,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:55,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416948751] [2021-11-02 22:21:55,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416948751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:55,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:55,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:21:55,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080788665] [2021-11-02 22:21:55,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:21:55,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:21:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:21:55,981 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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) [2021-11-02 22:21:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:56,456 INFO L93 Difference]: Finished difference Result 183 states and 193 transitions. [2021-11-02 22:21:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:21:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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 45 [2021-11-02 22:21:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:56,457 INFO L225 Difference]: With dead ends: 183 [2021-11-02 22:21:56,457 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 22:21:56,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:21:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 22:21:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 160. [2021-11-02 22:21:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 156 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2021-11-02 22:21:56,463 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 45 [2021-11-02 22:21:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:56,463 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2021-11-02 22:21:56,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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) [2021-11-02 22:21:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2021-11-02 22:21:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:21:56,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:56,464 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:56,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-02 22:21:56,465 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash -654936300, now seen corresponding path program 1 times [2021-11-02 22:21:56,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:56,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293759713] [2021-11-02 22:21:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:56,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:56,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:56,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:56,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293759713] [2021-11-02 22:21:56,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293759713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:56,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681262637] [2021-11-02 22:21:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:56,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:56,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:56,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:56,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:21:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:21:57,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:57,142 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 [2021-11-02 22:21:57,258 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:21:57,258 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 17 treesize of output 21 [2021-11-02 22:21:57,311 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 21 treesize of output 17 [2021-11-02 22:21:57,454 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:21:57,454 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-02 22:21:57,695 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:21:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 48 [2021-11-02 22:21:57,805 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 22:21:57,805 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-11-02 22:21:58,139 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 18 [2021-11-02 22:21:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:58,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681262637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:58,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:58,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-02 22:21:58,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966859854] [2021-11-02 22:21:58,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:21:58,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:21:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:21:58,228 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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) [2021-11-02 22:21:59,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:59,115 INFO L93 Difference]: Finished difference Result 263 states and 279 transitions. [2021-11-02 22:21:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:21:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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 50 [2021-11-02 22:21:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:59,117 INFO L225 Difference]: With dead ends: 263 [2021-11-02 22:21:59,117 INFO L226 Difference]: Without dead ends: 263 [2021-11-02 22:21:59,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:21:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-02 22:21:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 168. [2021-11-02 22:21:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 142 states have (on average 1.2394366197183098) internal successors, (176), 164 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 179 transitions. [2021-11-02 22:21:59,123 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 179 transitions. Word has length 50 [2021-11-02 22:21:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:59,124 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 179 transitions. [2021-11-02 22:21:59,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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) [2021-11-02 22:21:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 179 transitions. [2021-11-02 22:21:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:21:59,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:59,125 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:59,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:59,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:21:59,342 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr50REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:21:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash -654936299, now seen corresponding path program 1 times [2021-11-02 22:21:59,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:59,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877787448] [2021-11-02 22:21:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:59,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:59,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:59,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:59,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877787448] [2021-11-02 22:21:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877787448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:59,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390425549] [2021-11-02 22:21:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:59,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:59,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:59,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:59,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:22:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:22:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:00,086 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 [2021-11-02 22:22:00,223 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:22:00,224 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 11 treesize of output 11 [2021-11-02 22:22:00,276 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 [2021-11-02 22:22:00,380 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:22:00,380 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-02 22:22:00,636 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:22:00,637 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 19 treesize of output 18 [2021-11-02 22:22:00,676 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:22:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 43 [2021-11-02 22:22:00,820 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-02 22:22:00,820 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 94 [2021-11-02 22:22:00,839 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-02 22:22:00,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 73 [2021-11-02 22:22:01,289 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 44 [2021-11-02 22:22:01,295 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:22:01,295 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-02 22:22:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:01,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390425549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:01,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:01,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-11-02 22:22:01,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851782603] [2021-11-02 22:22:01,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:22:01,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:22:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:22:01,363 INFO L87 Difference]: Start difference. First operand 168 states and 179 transitions. Second operand has 28 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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) [2021-11-02 22:22:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:03,324 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-11-02 22:22:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:22:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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 50 [2021-11-02 22:22:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:03,326 INFO L225 Difference]: With dead ends: 238 [2021-11-02 22:22:03,326 INFO L226 Difference]: Without dead ends: 238 [2021-11-02 22:22:03,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=352, Invalid=1904, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:22:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-02 22:22:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 170. [2021-11-02 22:22:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 166 states have internal predecessors, (178), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:22:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 181 transitions. [2021-11-02 22:22:03,331 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 181 transitions. Word has length 50 [2021-11-02 22:22:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:03,331 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 181 transitions. [2021-11-02 22:22:03,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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) [2021-11-02 22:22:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 181 transitions. [2021-11-02 22:22:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:22:03,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:03,332 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:03,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:03,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:03,535 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:22:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1281782735, now seen corresponding path program 1 times [2021-11-02 22:22:03,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:03,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460047725] [2021-11-02 22:22:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:04,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:22:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:04,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:04,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460047725] [2021-11-02 22:22:04,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460047725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:04,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344491813] [2021-11-02 22:22:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:04,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:04,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:04,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:04,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:22:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:22:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:04,809 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 [2021-11-02 22:22:04,836 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 13 treesize of output 9 [2021-11-02 22:22:04,959 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:22:04,960 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 17 treesize of output 21 [2021-11-02 22:22:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:22:05,033 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 21 treesize of output 17 [2021-11-02 22:22:05,187 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:22:05,188 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 57 [2021-11-02 22:22:05,208 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-02 22:22:05,209 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 71 treesize of output 43 [2021-11-02 22:22:05,338 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:22:05,339 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 22 [2021-11-02 22:22:05,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:22:05,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2021-11-02 22:22:05,560 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 22:22:05,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:22:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-02 22:22:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:05,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-02 22:22:05,777 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:22:05,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 65 [2021-11-02 22:22:05,801 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-02 22:22:05,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 54 [2021-11-02 22:22:05,913 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:22:05,914 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2021-11-02 22:22:06,094 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-02 22:22:06,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-11-02 22:22:06,209 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-02 22:22:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 46 [2021-11-02 22:22:06,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.base, main_~end~0.offset] [2021-11-02 22:22:06,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:22:06,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-02 22:22:06,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463810869] [2021-11-02 22:22:06,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:22:06,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:22:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:22:06,923 INFO L87 Difference]: Start difference. First operand 170 states and 181 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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) [2021-11-02 22:22:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:08,162 INFO L93 Difference]: Finished difference Result 248 states and 263 transitions. [2021-11-02 22:22:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:22:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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 53 [2021-11-02 22:22:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:08,164 INFO L225 Difference]: With dead ends: 248 [2021-11-02 22:22:08,164 INFO L226 Difference]: Without dead ends: 248 [2021-11-02 22:22:08,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:22:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-02 22:22:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 196. [2021-11-02 22:22:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 170 states have (on average 1.2058823529411764) internal successors, (205), 192 states have internal predecessors, (205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:22:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 208 transitions. [2021-11-02 22:22:08,172 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 208 transitions. Word has length 53 [2021-11-02 22:22:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:08,172 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 208 transitions. [2021-11-02 22:22:08,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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) [2021-11-02 22:22:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 208 transitions. [2021-11-02 22:22:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:22:08,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:08,174 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:08,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:08,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:08,387 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:22:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1877818165, now seen corresponding path program 2 times [2021-11-02 22:22:08,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:08,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220604477] [2021-11-02 22:22:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:08,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:09,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:22:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:09,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:09,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220604477] [2021-11-02 22:22:09,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220604477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:09,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293211454] [2021-11-02 22:22:09,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:22:09,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:09,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:09,038 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:09,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:22:09,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:22:09,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:22:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:22:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:09,667 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 [2021-11-02 22:22:09,786 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:22:09,787 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 11 treesize of output 11 [2021-11-02 22:22:09,827 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 [2021-11-02 22:22:09,833 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 [2021-11-02 22:22:09,968 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:22:09,969 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2021-11-02 22:22:09,972 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 43 treesize of output 35 [2021-11-02 22:22:10,289 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:22:10,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 70 [2021-11-02 22:22:10,313 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-02 22:22:10,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 61 treesize of output 63 [2021-11-02 22:22:10,482 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:22:10,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:22:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:22:11,243 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-02 22:22:11,244 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-11-02 22:22:11,250 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:22:11,250 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2021-11-02 22:22:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:11,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293211454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:11,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:11,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-11-02 22:22:11,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860345074] [2021-11-02 22:22:11,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:22:11,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:22:11,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:22:11,347 INFO L87 Difference]: Start difference. First operand 196 states and 208 transitions. Second operand has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 34 states have internal predecessors, (102), 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) [2021-11-02 22:22:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:13,546 INFO L93 Difference]: Finished difference Result 259 states and 275 transitions. [2021-11-02 22:22:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:22:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 34 states have internal predecessors, (102), 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 55 [2021-11-02 22:22:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:13,548 INFO L225 Difference]: With dead ends: 259 [2021-11-02 22:22:13,548 INFO L226 Difference]: Without dead ends: 259 [2021-11-02 22:22:13,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=531, Invalid=3009, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 22:22:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-02 22:22:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 199. [2021-11-02 22:22:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.2023121387283238) internal successors, (208), 195 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:22:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 211 transitions. [2021-11-02 22:22:13,579 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 211 transitions. Word has length 55 [2021-11-02 22:22:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:13,579 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 211 transitions. [2021-11-02 22:22:13,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 34 states have internal predecessors, (102), 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) [2021-11-02 22:22:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 211 transitions. [2021-11-02 22:22:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:22:13,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:13,581 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:13,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:13,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:13,782 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:22:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:13,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1919836418, now seen corresponding path program 1 times [2021-11-02 22:22:13,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:13,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336558778] [2021-11-02 22:22:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:13,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:22:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:14,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:14,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336558778] [2021-11-02 22:22:14,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336558778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:14,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500089158] [2021-11-02 22:22:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:14,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:14,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:14,587 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:14,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:22:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 22:22:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:15,317 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 [2021-11-02 22:22:15,447 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:22:15,447 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 11 treesize of output 11 [2021-11-02 22:22:15,516 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 [2021-11-02 22:22:15,524 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 [2021-11-02 22:22:15,653 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:22:15,653 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-11-02 22:22:15,667 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:22:15,668 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 50 treesize of output 45 [2021-11-02 22:22:15,972 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:22:15,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 77 [2021-11-02 22:22:15,994 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-02 22:22:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 61 treesize of output 59 [2021-11-02 22:22:16,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 66 [2021-11-02 22:22:16,119 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 73 treesize of output 65 [2021-11-02 22:22:16,125 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:22:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 44 [2021-11-02 22:22:16,613 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 52 treesize of output 36 [2021-11-02 22:22:16,619 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:22:16,619 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 33 treesize of output 21 [2021-11-02 22:22:16,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:22:16,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:22:16,710 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 17 treesize of output 10 [2021-11-02 22:22:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:16,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500089158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:16,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:16,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 39 [2021-11-02 22:22:16,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427516775] [2021-11-02 22:22:16,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:22:16,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:22:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:22:16,759 INFO L87 Difference]: Start difference. First operand 199 states and 211 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 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) [2021-11-02 22:22:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:19,139 INFO L93 Difference]: Finished difference Result 230 states and 243 transitions. [2021-11-02 22:22:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:22:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 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 55 [2021-11-02 22:22:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:19,140 INFO L225 Difference]: With dead ends: 230 [2021-11-02 22:22:19,141 INFO L226 Difference]: Without dead ends: 230 [2021-11-02 22:22:19,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=448, Invalid=3212, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 22:22:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-02 22:22:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 198. [2021-11-02 22:22:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 172 states have (on average 1.197674418604651) internal successors, (206), 194 states have internal predecessors, (206), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:22:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 209 transitions. [2021-11-02 22:22:19,148 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 209 transitions. Word has length 55 [2021-11-02 22:22:19,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 209 transitions. [2021-11-02 22:22:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 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) [2021-11-02 22:22:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 209 transitions. [2021-11-02 22:22:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:22:19,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:19,150 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:19,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:19,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:19,366 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr66REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:22:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash -538056606, now seen corresponding path program 1 times [2021-11-02 22:22:19,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:19,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212562407] [2021-11-02 22:22:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:19,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:19,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:22:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:22:19,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:19,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212562407] [2021-11-02 22:22:19,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212562407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:19,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343151819] [2021-11-02 22:22:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:19,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:19,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:19,751 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:19,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:22:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 22:22:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:20,609 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 [2021-11-02 22:22:20,744 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:22:20,745 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 12 treesize of output 14 [2021-11-02 22:22:20,811 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 [2021-11-02 22:22:20,909 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 9 treesize of output 5 [2021-11-02 22:22:21,072 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:22:21,072 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 19 treesize of output 18 [2021-11-02 22:22:21,095 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-02 22:22:21,095 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 19 treesize of output 26 [2021-11-02 22:22:21,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:21,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:21,274 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:22:21,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:22:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:21,288 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:22:21,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-02 22:22:21,302 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 13 treesize of output 9 [2021-11-02 22:22:21,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:22:21,313 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 13 treesize of output 17 [2021-11-02 22:22:22,759 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-02 22:22:22,759 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 91 [2021-11-02 22:22:22,773 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-11-02 22:22:22,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 68 [2021-11-02 22:22:23,044 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 [2021-11-02 22:22:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:23,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343151819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:23,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:23,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 32 [2021-11-02 22:22:23,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799091654] [2021-11-02 22:22:23,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:22:23,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:22:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:22:23,088 INFO L87 Difference]: Start difference. First operand 198 states and 209 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 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) [2021-11-02 22:22:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:27,376 INFO L93 Difference]: Finished difference Result 256 states and 271 transitions. [2021-11-02 22:22:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 22:22:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 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 58 [2021-11-02 22:22:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:27,379 INFO L225 Difference]: With dead ends: 256 [2021-11-02 22:22:27,379 INFO L226 Difference]: Without dead ends: 256 [2021-11-02 22:22:27,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=950, Invalid=4600, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 22:22:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-02 22:22:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 212. [2021-11-02 22:22:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 186 states have (on average 1.1989247311827957) internal successors, (223), 208 states have internal predecessors, (223), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:22:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 226 transitions. [2021-11-02 22:22:27,386 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 226 transitions. Word has length 58 [2021-11-02 22:22:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:27,387 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 226 transitions. [2021-11-02 22:22:27,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 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) [2021-11-02 22:22:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 226 transitions. [2021-11-02 22:22:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:22:27,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:27,388 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:27,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:27,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:22:27,607 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:22:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1111684357, now seen corresponding path program 1 times [2021-11-02 22:22:27,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:27,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067033310] [2021-11-02 22:22:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:27,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:27,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:22:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:22:27,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:27,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067033310] [2021-11-02 22:22:27,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067033310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:27,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239583618] [2021-11-02 22:22:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:27,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:27,819 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:27,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:22:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:28,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:22:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:29,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.base, main_~end~0.offset] [2021-11-02 22:22:29,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:22:29,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:22:29,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952592709] [2021-11-02 22:22:29,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:22:29,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:29,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:22:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:22:29,136 INFO L87 Difference]: Start difference. First operand 212 states and 226 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 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) [2021-11-02 22:22:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:29,696 INFO L93 Difference]: Finished difference Result 261 states and 277 transitions. [2021-11-02 22:22:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:22:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 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 59 [2021-11-02 22:22:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:29,698 INFO L225 Difference]: With dead ends: 261 [2021-11-02 22:22:29,698 INFO L226 Difference]: Without dead ends: 261 [2021-11-02 22:22:29,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:22:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-02 22:22:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 221. [2021-11-02 22:22:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 217 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:22:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 236 transitions. [2021-11-02 22:22:29,706 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 236 transitions. Word has length 59 [2021-11-02 22:22:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:29,707 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 236 transitions. [2021-11-02 22:22:29,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 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) [2021-11-02 22:22:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 236 transitions. [2021-11-02 22:22:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:22:29,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:29,709 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:29,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:29,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:29,919 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:22:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1871746185, now seen corresponding path program 1 times [2021-11-02 22:22:29,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:29,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923977434] [2021-11-02 22:22:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:29,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:30,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:22:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:30,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:30,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923977434] [2021-11-02 22:22:30,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923977434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:30,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104085199] [2021-11-02 22:22:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:30,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:30,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:30,613 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:30,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:22:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 22:22:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:31,376 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 [2021-11-02 22:22:31,443 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:22:31,443 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 17 treesize of output 21 [2021-11-02 22:22:31,518 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 21 treesize of output 17 [2021-11-02 22:22:31,678 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:22:31,679 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-02 22:22:31,915 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:22:31,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 48 [2021-11-02 22:22:32,052 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-02 22:22:32,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 30 [2021-11-02 22:22:32,105 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-02 22:22:32,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-02 22:22:32,202 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:22:32,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 33 [2021-11-02 22:22:32,420 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-02 22:22:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 38 [2021-11-02 22:22:32,824 INFO L354 Elim1Store]: treesize reduction 112, result has 21.1 percent of original size [2021-11-02 22:22:32,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 66 [2021-11-02 22:22:32,944 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-02 22:22:32,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 53 [2021-11-02 22:22:33,491 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:22:33,492 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2021-11-02 22:22:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104085199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:33,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:33,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-11-02 22:22:33,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307453291] [2021-11-02 22:22:33,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:22:33,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:22:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:22:33,505 INFO L87 Difference]: Start difference. First operand 221 states and 236 transitions. Second operand has 39 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 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) [2021-11-02 22:23:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:56,505 INFO L93 Difference]: Finished difference Result 314 states and 335 transitions. [2021-11-02 22:23:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 22:23:56,506 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 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 60 [2021-11-02 22:23:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:56,508 INFO L225 Difference]: With dead ends: 314 [2021-11-02 22:23:56,508 INFO L226 Difference]: Without dead ends: 314 [2021-11-02 22:23:56,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=734, Invalid=3805, Unknown=17, NotChecked=0, Total=4556 [2021-11-02 22:23:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-02 22:23:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 229. [2021-11-02 22:23:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.1970443349753694) internal successors, (243), 225 states have internal predecessors, (243), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:23:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 246 transitions. [2021-11-02 22:23:56,517 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 246 transitions. Word has length 60 [2021-11-02 22:23:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:56,517 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 246 transitions. [2021-11-02 22:23:56,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 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) [2021-11-02 22:23:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 246 transitions. [2021-11-02 22:23:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:23:56,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:56,518 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:56,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:23:56,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:23:56,731 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr50REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:23:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1871746186, now seen corresponding path program 1 times [2021-11-02 22:23:56,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:56,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215054112] [2021-11-02 22:23:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:56,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:23:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:23:57,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:57,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215054112] [2021-11-02 22:23:57,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215054112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:57,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805654826] [2021-11-02 22:23:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:57,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:57,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:57,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:23:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 22:23:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:58,612 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 [2021-11-02 22:23:58,746 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:23:58,746 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 17 treesize of output 21 [2021-11-02 22:23:58,816 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 21 treesize of output 17 [2021-11-02 22:23:58,824 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 [2021-11-02 22:23:59,040 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:23:59,041 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-02 22:23:59,057 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:23:59,057 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 59 treesize of output 54 [2021-11-02 22:23:59,470 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-02 22:23:59,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 80 treesize of output 82 [2021-11-02 22:23:59,499 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:23:59,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 71 [2021-11-02 22:23:59,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:59,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:23:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:59,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:23:59,874 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 22:23:59,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:23:59,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-02 22:23:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-11-02 22:24:00,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:24:00,253 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-02 22:24:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 63 [2021-11-02 22:24:00,274 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:24:00,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 74 treesize of output 69 [2021-11-02 22:24:00,871 INFO L354 Elim1Store]: treesize reduction 112, result has 21.1 percent of original size [2021-11-02 22:24:00,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 103 [2021-11-02 22:24:00,895 INFO L354 Elim1Store]: treesize reduction 94, result has 24.8 percent of original size [2021-11-02 22:24:00,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 137 treesize of output 145 [2021-11-02 22:24:01,096 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-02 22:24:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 96 [2021-11-02 22:24:01,119 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-11-02 22:24:01,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 129 treesize of output 92 [2021-11-02 22:24:01,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.offset] [2021-11-02 22:24:01,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:24:01,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-02 22:24:01,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832939187] [2021-11-02 22:24:01,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:24:01,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:01,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:24:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:24:01,608 INFO L87 Difference]: Start difference. First operand 229 states and 246 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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) [2021-11-02 22:24:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:04,180 INFO L93 Difference]: Finished difference Result 315 states and 338 transitions. [2021-11-02 22:24:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:24:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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 60 [2021-11-02 22:24:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:04,182 INFO L225 Difference]: With dead ends: 315 [2021-11-02 22:24:04,182 INFO L226 Difference]: Without dead ends: 315 [2021-11-02 22:24:04,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=646, Invalid=4756, Unknown=0, NotChecked=0, Total=5402 [2021-11-02 22:24:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-02 22:24:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 232. [2021-11-02 22:24:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 228 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:24:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 249 transitions. [2021-11-02 22:24:04,191 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 249 transitions. Word has length 60 [2021-11-02 22:24:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:04,191 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 249 transitions. [2021-11-02 22:24:04,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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) [2021-11-02 22:24:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 249 transitions. [2021-11-02 22:24:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:24:04,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:04,193 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 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] [2021-11-02 22:24:04,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:04,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 22:24:04,411 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr79ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:24:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 303853138, now seen corresponding path program 1 times [2021-11-02 22:24:04,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:04,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533089949] [2021-11-02 22:24:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:04,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:04,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:04,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:04,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533089949] [2021-11-02 22:24:04,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533089949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:04,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881986739] [2021-11-02 22:24:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:04,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:04,837 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:04,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:24:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:05,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 22:24:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:05,861 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 [2021-11-02 22:24:05,865 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 [2021-11-02 22:24:06,035 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:24:06,035 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 11 treesize of output 11 [2021-11-02 22:24:06,043 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 12 treesize of output 14 [2021-11-02 22:24:06,111 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 21 treesize of output 17 [2021-11-02 22:24:06,278 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:24:06,278 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-02 22:24:06,590 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:24:06,590 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 19 treesize of output 18 [2021-11-02 22:24:06,624 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:24:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 48 [2021-11-02 22:24:06,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:06,772 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:24:06,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:24:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:06,784 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:24:06,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 42 [2021-11-02 22:24:06,795 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-02 22:24:06,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 37 [2021-11-02 22:24:07,632 INFO L354 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2021-11-02 22:24:07,633 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 50 [2021-11-02 22:24:07,636 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:24:07,637 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-02 22:24:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:07,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881986739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:07,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:07,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-11-02 22:24:07,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332955854] [2021-11-02 22:24:07,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:24:07,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:24:07,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:24:07,786 INFO L87 Difference]: Start difference. First operand 232 states and 249 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 32 states have internal predecessors, (109), 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) [2021-11-02 22:24:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:10,130 INFO L93 Difference]: Finished difference Result 283 states and 300 transitions. [2021-11-02 22:24:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:24:10,131 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 32 states have internal predecessors, (109), 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 62 [2021-11-02 22:24:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:10,133 INFO L225 Difference]: With dead ends: 283 [2021-11-02 22:24:10,134 INFO L226 Difference]: Without dead ends: 274 [2021-11-02 22:24:10,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=417, Invalid=2889, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 22:24:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-02 22:24:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 243. [2021-11-02 22:24:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 217 states have (on average 1.2027649769585254) internal successors, (261), 239 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:24:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 264 transitions. [2021-11-02 22:24:10,143 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 264 transitions. Word has length 62 [2021-11-02 22:24:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:10,144 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 264 transitions. [2021-11-02 22:24:10,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 32 states have internal predecessors, (109), 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) [2021-11-02 22:24:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 264 transitions. [2021-11-02 22:24:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:24:10,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:10,146 INFO L513 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, 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] [2021-11-02 22:24:10,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:10,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:24:10,355 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr67REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:24:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1297649434, now seen corresponding path program 1 times [2021-11-02 22:24:10,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:10,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130517292] [2021-11-02 22:24:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:10,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:10,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:24:10,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:10,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130517292] [2021-11-02 22:24:10,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130517292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:10,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427911544] [2021-11-02 22:24:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:10,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:10,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:10,759 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:10,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:24:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:11,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:24:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:12,225 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 37 treesize of output 29 [2021-11-02 22:24:12,227 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 26 treesize of output 14 [2021-11-02 22:24:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:24:12,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427911544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:12,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:12,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2021-11-02 22:24:12,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185144781] [2021-11-02 22:24:12,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:24:12,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:24:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:24:12,298 INFO L87 Difference]: Start difference. First operand 243 states and 264 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 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) [2021-11-02 22:24:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:14,253 INFO L93 Difference]: Finished difference Result 264 states and 283 transitions. [2021-11-02 22:24:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:24:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 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 63 [2021-11-02 22:24:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:14,254 INFO L225 Difference]: With dead ends: 264 [2021-11-02 22:24:14,255 INFO L226 Difference]: Without dead ends: 264 [2021-11-02 22:24:14,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 22:24:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-02 22:24:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 233. [2021-11-02 22:24:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 229 states have internal predecessors, (247), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:24:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 250 transitions. [2021-11-02 22:24:14,261 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 250 transitions. Word has length 63 [2021-11-02 22:24:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:14,261 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 250 transitions. [2021-11-02 22:24:14,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 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) [2021-11-02 22:24:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 250 transitions. [2021-11-02 22:24:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:24:14,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:14,262 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:14,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:14,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:24:14,487 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:24:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -39371996, now seen corresponding path program 2 times [2021-11-02 22:24:14,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:14,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212371328] [2021-11-02 22:24:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:14,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:15,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:15,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212371328] [2021-11-02 22:24:15,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212371328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:15,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636976889] [2021-11-02 22:24:15,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:24:15,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:15,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:15,148 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:15,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:24:16,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:24:16,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:24:16,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:24:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:16,367 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 [2021-11-02 22:24:16,478 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:24:16,478 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 17 treesize of output 21 [2021-11-02 22:24:16,528 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 21 treesize of output 17 [2021-11-02 22:24:16,671 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:24:16,671 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-02 22:24:17,015 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:24:17,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 48 [2021-11-02 22:24:17,115 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-02 22:24:17,115 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-11-02 22:24:17,595 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 13 [2021-11-02 22:24:17,690 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-02 22:24:17,690 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 21 [2021-11-02 22:24:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:24:17,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636976889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:17,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:17,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 36 [2021-11-02 22:24:17,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811907855] [2021-11-02 22:24:17,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 22:24:17,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 22:24:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:24:17,737 INFO L87 Difference]: Start difference. First operand 233 states and 250 transitions. Second operand has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 36 states have internal predecessors, (116), 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) [2021-11-02 22:24:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:19,686 INFO L93 Difference]: Finished difference Result 250 states and 263 transitions. [2021-11-02 22:24:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:24:19,686 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 36 states have internal predecessors, (116), 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 64 [2021-11-02 22:24:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:19,688 INFO L225 Difference]: With dead ends: 250 [2021-11-02 22:24:19,688 INFO L226 Difference]: Without dead ends: 250 [2021-11-02 22:24:19,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=572, Invalid=2850, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 22:24:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-02 22:24:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2021-11-02 22:24:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 207 states have (on average 1.1884057971014492) internal successors, (246), 229 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:24:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 249 transitions. [2021-11-02 22:24:19,697 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 249 transitions. Word has length 64 [2021-11-02 22:24:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:19,697 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 249 transitions. [2021-11-02 22:24:19,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 36 states have internal predecessors, (116), 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) [2021-11-02 22:24:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 249 transitions. [2021-11-02 22:24:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:24:19,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:19,699 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:19,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:19,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:24:19,923 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:24:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash -39371995, now seen corresponding path program 1 times [2021-11-02 22:24:19,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:19,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075833594] [2021-11-02 22:24:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:19,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:24:20,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:20,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075833594] [2021-11-02 22:24:20,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075833594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:20,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284741796] [2021-11-02 22:24:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:20,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:20,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:20,186 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:20,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:24:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:21,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:24:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:22,025 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 37 treesize of output 29 [2021-11-02 22:24:22,027 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 26 treesize of output 14 [2021-11-02 22:24:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:24:22,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284741796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:22,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:22,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-02 22:24:22,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716083581] [2021-11-02 22:24:22,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:24:22,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:24:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:24:22,067 INFO L87 Difference]: Start difference. First operand 233 states and 249 transitions. Second operand has 17 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 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) [2021-11-02 22:24:23,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:23,100 INFO L93 Difference]: Finished difference Result 286 states and 301 transitions. [2021-11-02 22:24:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:24:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 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 64 [2021-11-02 22:24:23,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:23,102 INFO L225 Difference]: With dead ends: 286 [2021-11-02 22:24:23,102 INFO L226 Difference]: Without dead ends: 286 [2021-11-02 22:24:23,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:24:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-02 22:24:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 237. [2021-11-02 22:24:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 211 states have (on average 1.180094786729858) internal successors, (249), 233 states have internal predecessors, (249), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:24:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 252 transitions. [2021-11-02 22:24:23,111 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 252 transitions. Word has length 64 [2021-11-02 22:24:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:23,112 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 252 transitions. [2021-11-02 22:24:23,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 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) [2021-11-02 22:24:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 252 transitions. [2021-11-02 22:24:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:24:23,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:23,114 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:23,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:23,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-02 22:24:23,335 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:24:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash -381380918, now seen corresponding path program 2 times [2021-11-02 22:24:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:23,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508968102] [2021-11-02 22:24:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:23,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:24,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:24,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:24,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508968102] [2021-11-02 22:24:24,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508968102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:24,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399399564] [2021-11-02 22:24:24,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:24:24,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:24,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:24,271 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:24,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:24:25,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:24:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:24:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 22:24:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:25,761 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 [2021-11-02 22:24:25,785 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 13 treesize of output 9 [2021-11-02 22:24:25,876 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:24:25,877 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 11 treesize of output 11 [2021-11-02 22:24:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:25,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:24:25,931 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 [2021-11-02 22:24:26,066 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:24:26,066 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-02 22:24:26,082 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-02 22:24:26,082 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 62 treesize of output 34 [2021-11-02 22:24:26,175 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:24:26,175 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-02 22:24:26,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:24:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2021-11-02 22:24:26,620 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 22:24:26,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:24:26,679 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:24:26,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-02 22:24:26,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-02 22:24:26,832 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:24:26,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 65 [2021-11-02 22:24:26,880 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-02 22:24:26,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 54 [2021-11-02 22:24:26,994 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:24:26,995 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2021-11-02 22:24:27,141 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-02 22:24:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-11-02 22:24:27,292 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-02 22:24:27,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 46 [2021-11-02 22:24:28,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.base, main_~end~0.offset] [2021-11-02 22:24:28,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:24:28,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-02 22:24:28,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885148871] [2021-11-02 22:24:28,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:24:28,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:24:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:24:28,077 INFO L87 Difference]: Start difference. First operand 237 states and 252 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 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) [2021-11-02 22:24:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:29,389 INFO L93 Difference]: Finished difference Result 314 states and 334 transitions. [2021-11-02 22:24:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:24:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 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 64 [2021-11-02 22:24:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:29,391 INFO L225 Difference]: With dead ends: 314 [2021-11-02 22:24:29,391 INFO L226 Difference]: Without dead ends: 314 [2021-11-02 22:24:29,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=482, Invalid=2598, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 22:24:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-02 22:24:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 263. [2021-11-02 22:24:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 237 states have (on average 1.1687763713080168) internal successors, (277), 259 states have internal predecessors, (277), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:24:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 280 transitions. [2021-11-02 22:24:29,398 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 280 transitions. Word has length 64 [2021-11-02 22:24:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:29,398 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 280 transitions. [2021-11-02 22:24:29,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 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) [2021-11-02 22:24:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 280 transitions. [2021-11-02 22:24:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:24:29,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:29,400 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:29,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:29,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:29,619 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:24:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1307166838, now seen corresponding path program 2 times [2021-11-02 22:24:29,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:29,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088988350] [2021-11-02 22:24:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:29,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:30,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:30,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:30,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088988350] [2021-11-02 22:24:30,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088988350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:30,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272620862] [2021-11-02 22:24:30,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:24:30,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:30,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:30,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:24:32,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:24:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:24:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-02 22:24:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:32,213 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 [2021-11-02 22:24:32,299 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:24:32,299 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 17 treesize of output 21 [2021-11-02 22:24:32,373 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 [2021-11-02 22:24:32,378 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 21 treesize of output 17 [2021-11-02 22:24:32,579 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:24:32,579 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-02 22:24:32,605 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:24:32,606 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 59 treesize of output 54 [2021-11-02 22:24:33,064 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:24:33,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 82 [2021-11-02 22:24:33,090 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-02 22:24:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 89 treesize of output 87 [2021-11-02 22:24:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:33,296 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:24:33,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:24:33,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:33,318 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:24:33,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-11-02 22:24:33,416 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-02 22:24:33,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-02 22:24:33,535 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:24:33,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 43 [2021-11-02 22:24:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:33,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:24:33,801 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-02 22:24:33,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 70 [2021-11-02 22:24:33,821 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-02 22:24:33,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 81 treesize of output 79 [2021-11-02 22:24:34,295 INFO L354 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2021-11-02 22:24:34,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 108 [2021-11-02 22:24:34,326 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-11-02 22:24:34,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 110 [2021-11-02 22:24:34,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:34,472 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-02 22:24:34,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 80 [2021-11-02 22:24:34,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:34,480 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:24:34,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 70 [2021-11-02 22:24:35,605 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-02 22:24:35,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 90 [2021-11-02 22:24:35,926 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-02 22:24:35,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 41 [2021-11-02 22:24:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:40,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272620862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:40,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:40,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 51 [2021-11-02 22:24:40,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079813556] [2021-11-02 22:24:40,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 22:24:40,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 22:24:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2403, Unknown=1, NotChecked=0, Total=2652 [2021-11-02 22:24:40,136 INFO L87 Difference]: Start difference. First operand 263 states and 280 transitions. Second operand has 52 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 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) [2021-11-02 22:25:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:38,630 INFO L93 Difference]: Finished difference Result 358 states and 381 transitions. [2021-11-02 22:25:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 22:25:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 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 65 [2021-11-02 22:25:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:38,633 INFO L225 Difference]: With dead ends: 358 [2021-11-02 22:25:38,634 INFO L226 Difference]: Without dead ends: 358 [2021-11-02 22:25:38,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=1193, Invalid=8298, Unknown=15, NotChecked=0, Total=9506 [2021-11-02 22:25:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-02 22:25:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 266. [2021-11-02 22:25:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 240 states have (on average 1.175) internal successors, (282), 262 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:25:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 285 transitions. [2021-11-02 22:25:38,643 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 285 transitions. Word has length 65 [2021-11-02 22:25:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:38,644 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 285 transitions. [2021-11-02 22:25:38,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 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) [2021-11-02 22:25:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 285 transitions. [2021-11-02 22:25:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:25:38,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:38,646 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:38,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:38,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 22:25:38,863 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr50REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:25:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:38,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1307166839, now seen corresponding path program 2 times [2021-11-02 22:25:38,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:38,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378053326] [2021-11-02 22:25:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:38,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:25:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:41,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:41,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378053326] [2021-11-02 22:25:41,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378053326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:41,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395766834] [2021-11-02 22:25:41,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:25:41,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:41,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:41,164 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:41,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:25:42,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:25:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-02 22:25:42,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:42,734 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 [2021-11-02 22:25:42,814 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:25:42,814 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 11 treesize of output 11 [2021-11-02 22:25:42,875 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 [2021-11-02 22:25:42,879 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 [2021-11-02 22:25:43,028 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:25:43,028 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2021-11-02 22:25:43,031 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 43 treesize of output 35 [2021-11-02 22:25:43,425 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:25:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 70 [2021-11-02 22:25:43,450 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-02 22:25:43,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 73 treesize of output 75 [2021-11-02 22:25:43,628 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-11-02 22:25:43,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 31 [2021-11-02 22:25:43,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:43,660 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-02 22:25:43,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 25 [2021-11-02 22:25:43,749 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 [2021-11-02 22:25:43,763 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:25:43,763 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 11 treesize of output 11 [2021-11-02 22:25:43,876 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:25:43,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 43 treesize of output 34 [2021-11-02 22:25:43,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:25:44,121 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-02 22:25:44,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 70 [2021-11-02 22:25:44,147 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-02 22:25:44,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 81 treesize of output 79 [2021-11-02 22:25:44,650 INFO L354 Elim1Store]: treesize reduction 128, result has 22.9 percent of original size [2021-11-02 22:25:44,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 116 [2021-11-02 22:25:44,694 INFO L354 Elim1Store]: treesize reduction 108, result has 23.9 percent of original size [2021-11-02 22:25:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 125 [2021-11-02 22:25:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:45,290 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-02 22:25:45,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 100 [2021-11-02 22:25:45,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:45,309 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-02 22:25:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 73 [2021-11-02 22:25:52,664 INFO L354 Elim1Store]: treesize reduction 41, result has 8.9 percent of original size [2021-11-02 22:25:52,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 88 [2021-11-02 22:25:52,670 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:25:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-11-02 22:25:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:52,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395766834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:52,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:52,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 52 [2021-11-02 22:25:52,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77107691] [2021-11-02 22:25:52,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 22:25:52,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 22:25:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2524, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 22:25:52,777 INFO L87 Difference]: Start difference. First operand 266 states and 285 transitions. Second operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 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) [2021-11-02 22:26:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:54,498 INFO L93 Difference]: Finished difference Result 354 states and 378 transitions. [2021-11-02 22:26:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-02 22:26:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 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 65 [2021-11-02 22:26:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:54,501 INFO L225 Difference]: With dead ends: 354 [2021-11-02 22:26:54,501 INFO L226 Difference]: Without dead ends: 354 [2021-11-02 22:26:54,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1325, Invalid=9797, Unknown=8, NotChecked=0, Total=11130 [2021-11-02 22:26:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-02 22:26:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 273. [2021-11-02 22:26:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 269 states have internal predecessors, (292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:26:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 295 transitions. [2021-11-02 22:26:54,512 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 295 transitions. Word has length 65 [2021-11-02 22:26:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:54,513 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 295 transitions. [2021-11-02 22:26:54,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 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) [2021-11-02 22:26:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 295 transitions. [2021-11-02 22:26:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:26:54,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:54,515 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2021-11-02 22:26:54,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:54,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-02 22:26:54,731 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:26:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1265148585, now seen corresponding path program 1 times [2021-11-02 22:26:54,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:54,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404992051] [2021-11-02 22:26:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:54,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:55,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:26:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:55,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:55,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404992051] [2021-11-02 22:26:55,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404992051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:55,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470149533] [2021-11-02 22:26:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:55,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:55,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:55,480 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:55,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:26:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:57,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-02 22:26:57,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:57,110 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 [2021-11-02 22:26:57,254 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:26:57,254 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 17 treesize of output 21 [2021-11-02 22:26:57,333 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 [2021-11-02 22:26:57,341 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 21 treesize of output 17 [2021-11-02 22:26:57,519 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:26:57,519 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-02 22:26:57,531 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:26:57,531 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 59 treesize of output 54 [2021-11-02 22:26:58,004 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:26:58,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 82 [2021-11-02 22:26:58,027 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-02 22:26:58,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 73 treesize of output 71 [2021-11-02 22:26:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:26:58,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:26:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:26:58,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:26:58,325 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 22:26:58,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:26:58,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2021-11-02 22:26:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:26:58,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:26:58,612 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-02 22:26:58,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 65 [2021-11-02 22:26:58,630 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-02 22:26:58,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 treesize of output 70 [2021-11-02 22:26:59,025 INFO L354 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2021-11-02 22:26:59,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 98 [2021-11-02 22:26:59,055 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-11-02 22:26:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 96 [2021-11-02 22:26:59,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:26:59,164 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-02 22:26:59,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 75 [2021-11-02 22:26:59,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:26:59,173 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:26:59,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-11-02 22:26:59,985 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-02 22:26:59,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 59 [2021-11-02 22:27:01,591 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 22:27:01,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 29 [2021-11-02 22:27:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:01,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470149533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:01,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:01,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 45 [2021-11-02 22:27:01,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196422536] [2021-11-02 22:27:01,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 22:27:01,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:01,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 22:27:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1791, Unknown=2, NotChecked=0, Total=1980 [2021-11-02 22:27:01,601 INFO L87 Difference]: Start difference. First operand 273 states and 295 transitions. Second operand has 45 states, 45 states have (on average 2.577777777777778) internal successors, (116), 44 states have internal predecessors, (116), 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) [2021-11-02 22:27:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:21,371 INFO L93 Difference]: Finished difference Result 339 states and 363 transitions. [2021-11-02 22:27:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:27:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.577777777777778) internal successors, (116), 44 states have internal predecessors, (116), 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 65 [2021-11-02 22:27:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:21,373 INFO L225 Difference]: With dead ends: 339 [2021-11-02 22:27:21,373 INFO L226 Difference]: Without dead ends: 339 [2021-11-02 22:27:21,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=524, Invalid=4876, Unknown=2, NotChecked=0, Total=5402 [2021-11-02 22:27:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-02 22:27:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 276. [2021-11-02 22:27:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 250 states have (on average 1.18) internal successors, (295), 272 states have internal predecessors, (295), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 298 transitions. [2021-11-02 22:27:21,380 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 298 transitions. Word has length 65 [2021-11-02 22:27:21,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:21,381 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 298 transitions. [2021-11-02 22:27:21,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.577777777777778) internal successors, (116), 44 states have internal predecessors, (116), 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) [2021-11-02 22:27:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 298 transitions. [2021-11-02 22:27:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:27:21,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:21,382 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2021-11-02 22:27:21,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:21,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 22:27:21,595 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr54REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:27:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash 564904763, now seen corresponding path program 1 times [2021-11-02 22:27:21,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:21,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254374567] [2021-11-02 22:27:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:21,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:22,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:22,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:22,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254374567] [2021-11-02 22:27:22,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254374567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:22,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137302915] [2021-11-02 22:27:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:22,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:22,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:22,813 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:22,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:27:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:24,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 22:27:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:24,552 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 [2021-11-02 22:27:24,667 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:27:24,667 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 17 treesize of output 21 [2021-11-02 22:27:24,726 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 21 treesize of output 17 [2021-11-02 22:27:24,741 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 [2021-11-02 22:27:24,914 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:27:24,915 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 42 [2021-11-02 22:27:24,919 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 52 treesize of output 44 [2021-11-02 22:27:25,217 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:27:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 75 [2021-11-02 22:27:25,238 INFO L354 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2021-11-02 22:27:25,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 74 [2021-11-02 22:27:25,412 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:27:25,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:27:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:27:25,483 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-02 22:27:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-02 22:27:25,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-11-02 22:27:25,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:27:25,802 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-02 22:27:25,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 63 [2021-11-02 22:27:25,826 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:27:25,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 74 treesize of output 69 [2021-11-02 22:27:26,389 INFO L354 Elim1Store]: treesize reduction 132, result has 20.5 percent of original size [2021-11-02 22:27:26,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 99 [2021-11-02 22:27:26,417 INFO L354 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2021-11-02 22:27:26,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 97 [2021-11-02 22:27:26,548 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-02 22:27:26,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 81 [2021-11-02 22:27:26,560 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-02 22:27:26,560 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 100 [2021-11-02 22:27:27,157 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 74 [2021-11-02 22:27:27,423 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:27:27,423 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 34 [2021-11-02 22:27:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:31,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137302915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:31,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:31,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 51 [2021-11-02 22:27:31,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965408509] [2021-11-02 22:27:31,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 22:27:31,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 22:27:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2429, Unknown=1, NotChecked=0, Total=2652 [2021-11-02 22:27:31,712 INFO L87 Difference]: Start difference. First operand 276 states and 298 transitions. Second operand has 52 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 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) [2021-11-02 22:27:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:45,323 INFO L93 Difference]: Finished difference Result 346 states and 372 transitions. [2021-11-02 22:27:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:27:45,324 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 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 66 [2021-11-02 22:27:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:45,325 INFO L225 Difference]: With dead ends: 346 [2021-11-02 22:27:45,327 INFO L226 Difference]: Without dead ends: 346 [2021-11-02 22:27:45,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1059, Invalid=7311, Unknown=2, NotChecked=0, Total=8372 [2021-11-02 22:27:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-02 22:27:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 278. [2021-11-02 22:27:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 252 states have (on average 1.1825396825396826) internal successors, (298), 274 states have internal predecessors, (298), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 301 transitions. [2021-11-02 22:27:45,337 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 301 transitions. Word has length 66 [2021-11-02 22:27:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:45,337 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 301 transitions. [2021-11-02 22:27:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 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) [2021-11-02 22:27:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 301 transitions. [2021-11-02 22:27:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:27:45,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:45,339 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2021-11-02 22:27:45,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:45,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 22:27:45,555 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr55REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:27:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 564904764, now seen corresponding path program 1 times [2021-11-02 22:27:45,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:45,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049682543] [2021-11-02 22:27:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:45,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:47,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:47,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049682543] [2021-11-02 22:27:47,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049682543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:47,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135362716] [2021-11-02 22:27:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:47,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:47,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:47,473 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:47,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:27:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-02 22:27:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:49,811 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 [2021-11-02 22:27:49,919 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:27:49,919 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 17 treesize of output 21 [2021-11-02 22:27:50,007 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 [2021-11-02 22:27:50,019 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 21 treesize of output 17 [2021-11-02 22:27:50,248 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:27:50,248 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-02 22:27:50,261 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:27:50,262 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 59 treesize of output 54 [2021-11-02 22:27:50,751 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:27:50,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 82 [2021-11-02 22:27:50,775 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-02 22:27:50,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 73 treesize of output 71 [2021-11-02 22:27:50,993 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:27:50,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:27:51,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:51,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-02 22:27:51,137 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 22:27:51,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:27:51,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-02 22:27:51,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-11-02 22:27:51,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2021-11-02 22:27:51,552 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-02 22:27:51,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 70 [2021-11-02 22:27:51,576 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-02 22:27:51,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 81 treesize of output 79 [2021-11-02 22:27:52,104 INFO L354 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2021-11-02 22:27:52,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 96 [2021-11-02 22:27:52,140 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-11-02 22:27:52,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 91 [2021-11-02 22:27:52,278 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-02 22:27:52,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 89 [2021-11-02 22:27:52,311 INFO L354 Elim1Store]: treesize reduction 226, result has 13.1 percent of original size [2021-11-02 22:27:52,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 84 [2021-11-02 22:27:52,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.offset] [2021-11-02 22:27:52,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:52,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-02 22:27:52,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908552038] [2021-11-02 22:27:52,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:27:52,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:27:52,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1806, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:27:52,720 INFO L87 Difference]: Start difference. First operand 278 states and 301 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2021-11-02 22:27:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:58,444 INFO L93 Difference]: Finished difference Result 350 states and 375 transitions. [2021-11-02 22:27:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 22:27:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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 66 [2021-11-02 22:27:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:58,446 INFO L225 Difference]: With dead ends: 350 [2021-11-02 22:27:58,447 INFO L226 Difference]: Without dead ends: 350 [2021-11-02 22:27:58,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1036, Invalid=6104, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 22:27:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-02 22:27:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 280. [2021-11-02 22:27:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 254 states have (on average 1.1811023622047243) internal successors, (300), 276 states have internal predecessors, (300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2021-11-02 22:27:58,456 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 66 [2021-11-02 22:27:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:58,456 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2021-11-02 22:27:58,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2021-11-02 22:27:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2021-11-02 22:27:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:27:58,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:58,458 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2021-11-02 22:27:58,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-02 22:27:58,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:58,663 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:27:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1707604507, now seen corresponding path program 1 times [2021-11-02 22:27:58,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:58,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266412008] [2021-11-02 22:27:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:58,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:28:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:02,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:02,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266412008] [2021-11-02 22:28:02,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266412008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:02,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950340812] [2021-11-02 22:28:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:02,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:02,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:02,727 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:02,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:28:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-02 22:28:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:05,190 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 [2021-11-02 22:28:05,399 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:28:05,399 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 17 treesize of output 21 [2021-11-02 22:28:05,504 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 [2021-11-02 22:28:05,513 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 21 treesize of output 17 [2021-11-02 22:28:05,772 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:28:05,772 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 42 [2021-11-02 22:28:05,776 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 52 treesize of output 44 [2021-11-02 22:28:06,253 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-02 22:28:06,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 80 treesize of output 82 [2021-11-02 22:28:06,282 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-02 22:28:06,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 71 [2021-11-02 22:28:06,525 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-11-02 22:28:06,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 31 [2021-11-02 22:28:06,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:28:06,553 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-02 22:28:06,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 30 [2021-11-02 22:28:06,699 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-02 22:28:06,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-02 22:28:06,830 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:28:06,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 33 [2021-11-02 22:28:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:28:07,159 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-02 22:28:07,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 65 [2021-11-02 22:28:07,186 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-02 22:28:07,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 70 [2021-11-02 22:28:07,758 INFO L354 Elim1Store]: treesize reduction 132, result has 20.5 percent of original size [2021-11-02 22:28:07,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 111 [2021-11-02 22:28:07,797 INFO L354 Elim1Store]: treesize reduction 124, result has 21.5 percent of original size [2021-11-02 22:28:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 103 [2021-11-02 22:28:07,966 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-11-02 22:28:07,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 216 treesize of output 92 [2021-11-02 22:28:07,988 INFO L354 Elim1Store]: treesize reduction 89, result has 11.0 percent of original size [2021-11-02 22:28:07,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 165 treesize of output 128 [2021-11-02 22:28:07,993 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 114 treesize of output 98 [2021-11-02 22:28:09,228 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-02 22:28:09,229 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 55 [2021-11-02 22:28:09,235 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 22:28:09,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 32 [2021-11-02 22:28:09,398 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 [2021-11-02 22:28:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:09,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950340812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:09,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:09,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26] total 58 [2021-11-02 22:28:09,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771337601] [2021-11-02 22:28:09,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 22:28:09,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:09,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 22:28:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3054, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 22:28:09,406 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 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) [2021-11-02 22:28:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:19,804 INFO L93 Difference]: Finished difference Result 364 states and 389 transitions. [2021-11-02 22:28:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 22:28:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 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 68 [2021-11-02 22:28:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:19,807 INFO L225 Difference]: With dead ends: 364 [2021-11-02 22:28:19,807 INFO L226 Difference]: Without dead ends: 364 [2021-11-02 22:28:19,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1123, Invalid=10007, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 22:28:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-02 22:28:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 286. [2021-11-02 22:28:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 260 states have (on average 1.1846153846153846) internal successors, (308), 282 states have internal predecessors, (308), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 311 transitions. [2021-11-02 22:28:19,816 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 311 transitions. Word has length 68 [2021-11-02 22:28:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:19,817 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 311 transitions. [2021-11-02 22:28:19,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 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) [2021-11-02 22:28:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 311 transitions. [2021-11-02 22:28:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:28:19,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:19,819 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:19,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:20,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:20,035 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr74ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1829392070, now seen corresponding path program 1 times [2021-11-02 22:28:20,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:20,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835460665] [2021-11-02 22:28:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:20,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:20,090 ERROR L253 erpolLogProxyWrapper]: Interpolant 18 not inductive [2021-11-02 22:28:20,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-02 22:28:20,107 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-02 22:28:20,112 INFO L168 Benchmark]: Toolchain (without parser) took 407452.60 ms. Allocated memory was 94.4 MB in the beginning and 509.6 MB in the end (delta: 415.2 MB). Free memory was 57.8 MB in the beginning and 152.8 MB in the end (delta: -95.1 MB). Peak memory consumption was 320.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:28:20,113 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 94.4 MB. Free memory is still 75.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:28:20,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 525.30 ms. Allocated memory is still 94.4 MB. Free memory was 57.5 MB in the beginning and 62.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:28:20,114 INFO L168 Benchmark]: Boogie Preprocessor took 87.00 ms. Allocated memory is still 94.4 MB. Free memory was 62.0 MB in the beginning and 58.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:28:20,114 INFO L168 Benchmark]: RCFGBuilder took 989.21 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 58.8 MB in the beginning and 78.6 MB in the end (delta: -19.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2021-11-02 22:28:20,114 INFO L168 Benchmark]: TraceAbstraction took 405842.92 ms. Allocated memory was 113.2 MB in the beginning and 509.6 MB in the end (delta: 396.4 MB). Free memory was 78.0 MB in the beginning and 152.8 MB in the end (delta: -74.9 MB). Peak memory consumption was 321.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:28:20,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 94.4 MB. Free memory is still 75.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 525.30 ms. Allocated memory is still 94.4 MB. Free memory was 57.5 MB in the beginning and 62.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 87.00 ms. Allocated memory is still 94.4 MB. Free memory was 62.0 MB in the beginning and 58.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 989.21 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 58.8 MB in the beginning and 78.6 MB in the end (delta: -19.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 405842.92 ms. Allocated memory was 113.2 MB in the beginning and 509.6 MB in the end (delta: 396.4 MB). Free memory was 78.0 MB in the beginning and 152.8 MB in the end (delta: -74.9 MB). Peak memory consumption was 321.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-02 22:28:20,339 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-02 22:28:20,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU --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 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:28:23,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:28:23,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:28:23,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:28:23,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:28:23,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:28:23,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:28:23,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:28:23,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:28:23,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:28:23,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:28:23,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:28:23,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:28:23,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:28:23,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:28:23,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:28:23,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:28:23,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:28:23,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:28:23,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:28:23,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:28:23,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:28:23,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:28:23,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:28:23,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:28:23,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:28:23,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:28:23,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:28:23,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:28:23,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:28:23,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:28:23,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:28:23,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:28:23,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:28:23,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:28:23,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:28:23,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:28:23,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:28:23,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:28:23,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:28:23,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:28:23,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:28:23,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:28:23,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:28:23,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:28:23,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:28:23,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:28:23,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:28:23,334 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:28:23,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:28:23,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:28:23,335 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:28:23,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:28:23,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:28:23,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:28:23,336 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:28:23,336 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:28:23,337 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:28:23,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:28:23,337 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:28:23,338 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:28:23,338 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:28:23,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:28:23,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:28:23,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:28:23,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:28:23,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:28:23,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:28:23,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:28:23,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:28:23,341 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:28:23,341 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:28:23,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:28:23,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:28:23,342 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_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b [2021-11-02 22:28:23,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:28:23,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:28:23,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:28:23,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:28:23,791 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:28:23,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-11-02 22:28:23,886 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/5b98b97d2/6d29f568311948638402bafd67aab35c/FLAG7a9e909de [2021-11-02 22:28:24,803 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:28:24,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-11-02 22:28:24,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/5b98b97d2/6d29f568311948638402bafd67aab35c/FLAG7a9e909de [2021-11-02 22:28:24,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/data/5b98b97d2/6d29f568311948638402bafd67aab35c [2021-11-02 22:28:24,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:28:24,972 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:28:24,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:28:24,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:28:24,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:28:24,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:28:24" (1/1) ... [2021-11-02 22:28:24,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c942eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:24, skipping insertion in model container [2021-11-02 22:28:24,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:28:24" (1/1) ... [2021-11-02 22:28:25,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:28:25,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:28:25,450 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-11-02 22:28:25,455 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-11-02 22:28:25,456 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-11-02 22:28:25,458 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-11-02 22:28:25,459 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-11-02 22:28:25,462 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-11-02 22:28:25,463 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-11-02 22:28:25,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:28:25,502 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:28:25,550 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-11-02 22:28:25,552 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-11-02 22:28:25,553 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-11-02 22:28:25,554 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-11-02 22:28:25,555 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-11-02 22:28:25,558 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-11-02 22:28:25,559 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-11-02 22:28:25,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:28:25,618 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:28:25,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25 WrapperNode [2021-11-02 22:28:25,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:28:25,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:28:25,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:28:25,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:28:25,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:28:25,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:28:25,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:28:25,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:28:25,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (1/1) ... [2021-11-02 22:28:25,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:28:25,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:25,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:28:25,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:28:25,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:28:25,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:28:25,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:28:25,849 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:28:25,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:28:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:28:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:28:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:28:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:28:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:28:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:28:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:28:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:28:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:28:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:28:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:28:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:28:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:28:25,852 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:28:25,852 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:28:25,852 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:28:25,852 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:28:25,852 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:28:25,853 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:28:25,853 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:28:25,853 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:28:25,853 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:28:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:28:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:28:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:28:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:28:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:28:25,855 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:28:25,855 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:28:25,855 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:28:25,855 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:28:25,855 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:28:25,856 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:28:25,856 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:28:25,856 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:28:25,856 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:28:25,856 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:28:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:28:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:28:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:28:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:28:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:28:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:28:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:28:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:28:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:28:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:28:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:28:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:28:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:28:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:28:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:28:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:28:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:28:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:28:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:28:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:28:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:28:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:28:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:28:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:28:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:28:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:28:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:28:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:28:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:28:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:28:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:28:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:28:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:28:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:28:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:28:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:28:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:28:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:28:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:28:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:28:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:28:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:28:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:28:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:28:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:28:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:28:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:28:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:28:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:28:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:28:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:28:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:28:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:28:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:28:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:28:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:28:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:28:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:28:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:28:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:28:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:28:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:28:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:28:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:28:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:28:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:28:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:28:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:28:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:28:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:28:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:28:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:28:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:28:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:28:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:28:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 22:28:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 22:28:27,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:28:27,213 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 22:28:27,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:28:27 BoogieIcfgContainer [2021-11-02 22:28:27,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:28:27,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:28:27,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:28:27,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:28:27,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:28:24" (1/3) ... [2021-11-02 22:28:27,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c215795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:28:27, skipping insertion in model container [2021-11-02 22:28:27,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:25" (2/3) ... [2021-11-02 22:28:27,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c215795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:28:27, skipping insertion in model container [2021-11-02 22:28:27,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:28:27" (3/3) ... [2021-11-02 22:28:27,227 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2021-11-02 22:28:27,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:28:27,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2021-11-02 22:28:27,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:28:27,337 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 [2021-11-02 22:28:27,337 INFO L340 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2021-11-02 22:28:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 89 states have (on average 2.235955056179775) internal successors, (199), 169 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:28:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:28:27,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:27,399 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:27,399 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1467711178, now seen corresponding path program 1 times [2021-11-02 22:28:27,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:27,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392154630] [2021-11-02 22:28:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:27,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:27,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:27,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:27,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:28:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:28:27,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:27,748 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 [2021-11-02 22:28:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:27,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:27,818 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:27,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392154630] [2021-11-02 22:28:27,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392154630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:27,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:27,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:28:27,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037202541] [2021-11-02 22:28:27,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:28:27,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:28:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:27,859 INFO L87 Difference]: Start difference. First operand has 174 states, 89 states have (on average 2.235955056179775) internal successors, (199), 169 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-02 22:28:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:28,365 INFO L93 Difference]: Finished difference Result 201 states and 208 transitions. [2021-11-02 22:28:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-02 22:28:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:28,384 INFO L225 Difference]: With dead ends: 201 [2021-11-02 22:28:28,385 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 22:28:28,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 22:28:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 172. [2021-11-02 22:28:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 92 states have (on average 1.923913043478261) internal successors, (177), 168 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 180 transitions. [2021-11-02 22:28:28,499 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 180 transitions. Word has length 7 [2021-11-02 22:28:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:28,501 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 180 transitions. [2021-11-02 22:28:28,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-02 22:28:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 180 transitions. [2021-11-02 22:28:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:28:28,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:28,505 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:28,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:28,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:28,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1467711177, now seen corresponding path program 1 times [2021-11-02 22:28:28,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:28,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316412656] [2021-11-02 22:28:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:28,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:28,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:28,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:28:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:28:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:28,935 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 [2021-11-02 22:28:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:28,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:29,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:29,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316412656] [2021-11-02 22:28:29,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316412656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:29,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:29,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 22:28:29,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460713576] [2021-11-02 22:28:29,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:28:29,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:28:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:29,075 INFO L87 Difference]: Start difference. First operand 172 states and 180 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-02 22:28:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:29,544 INFO L93 Difference]: Finished difference Result 168 states and 175 transitions. [2021-11-02 22:28:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2021-11-02 22:28:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:29,548 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:28:29,548 INFO L226 Difference]: Without dead ends: 168 [2021-11-02 22:28:29,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-02 22:28:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-02 22:28:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 92 states have (on average 1.8695652173913044) internal successors, (172), 164 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 175 transitions. [2021-11-02 22:28:29,570 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 175 transitions. Word has length 7 [2021-11-02 22:28:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 175 transitions. [2021-11-02 22:28:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-02 22:28:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 175 transitions. [2021-11-02 22:28:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:28:29,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:29,576 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:29,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:29,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:29,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash -480814214, now seen corresponding path program 1 times [2021-11-02 22:28:29,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:29,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618540674] [2021-11-02 22:28:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:29,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:29,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:29,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:28:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:28:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:30,066 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 [2021-11-02 22:28:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:30,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:30,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:30,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618540674] [2021-11-02 22:28:30,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618540674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:30,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:30,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:28:30,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800382812] [2021-11-02 22:28:30,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:28:30,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:28:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:30,148 INFO L87 Difference]: Start difference. First operand 168 states and 175 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:28:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:30,564 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2021-11-02 22:28:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-11-02 22:28:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:30,567 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:28:30,567 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 22:28:30,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 22:28:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-11-02 22:28:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 93 states have (on average 1.7956989247311828) internal successors, (167), 158 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 170 transitions. [2021-11-02 22:28:30,580 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 170 transitions. Word has length 11 [2021-11-02 22:28:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:30,581 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 170 transitions. [2021-11-02 22:28:30,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:28:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 170 transitions. [2021-11-02 22:28:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:28:30,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:30,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:30,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:30,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:30,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash -480814213, now seen corresponding path program 1 times [2021-11-02 22:28:30,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:30,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917799471] [2021-11-02 22:28:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:30,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:30,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:30,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:30,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:28:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:30,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:28:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:31,033 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 [2021-11-02 22:28:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:31,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:31,137 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:31,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917799471] [2021-11-02 22:28:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917799471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:31,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:31,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 22:28:31,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029047458] [2021-11-02 22:28:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:28:31,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:28:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:31,141 INFO L87 Difference]: Start difference. First operand 162 states and 170 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-02 22:28:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:31,665 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2021-11-02 22:28:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:28:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2021-11-02 22:28:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:31,672 INFO L225 Difference]: With dead ends: 179 [2021-11-02 22:28:31,673 INFO L226 Difference]: Without dead ends: 179 [2021-11-02 22:28:31,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-02 22:28:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 166. [2021-11-02 22:28:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.71) internal successors, (171), 162 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 174 transitions. [2021-11-02 22:28:31,690 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 174 transitions. Word has length 11 [2021-11-02 22:28:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:31,691 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 174 transitions. [2021-11-02 22:28:31,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-02 22:28:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 174 transitions. [2021-11-02 22:28:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:28:31,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:31,692 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:31,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:31,899 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1256938855, now seen corresponding path program 1 times [2021-11-02 22:28:31,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:31,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065350627] [2021-11-02 22:28:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:31,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:31,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:31,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:31,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:28:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:28:32,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:32,189 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 [2021-11-02 22:28:32,279 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 22:28:32,279 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 19 treesize of output 24 [2021-11-02 22:28:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:32,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:32,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:32,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065350627] [2021-11-02 22:28:32,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065350627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:32,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:32,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:28:32,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939062802] [2021-11-02 22:28:32,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:28:32,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:28:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:32,432 INFO L87 Difference]: Start difference. First operand 166 states and 174 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-02 22:28:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:33,016 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2021-11-02 22:28:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:28:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 16 [2021-11-02 22:28:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:33,018 INFO L225 Difference]: With dead ends: 166 [2021-11-02 22:28:33,018 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 22:28:33,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:28:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 22:28:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2021-11-02 22:28:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.5686274509803921) internal successors, (160), 149 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2021-11-02 22:28:33,027 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 16 [2021-11-02 22:28:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:33,028 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2021-11-02 22:28:33,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-02 22:28:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2021-11-02 22:28:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:28:33,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:33,029 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:33,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:33,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:33,244 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1256938854, now seen corresponding path program 1 times [2021-11-02 22:28:33,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:33,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008355289] [2021-11-02 22:28:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:33,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:33,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:33,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:28:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:28:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:33,538 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 [2021-11-02 22:28:33,675 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:28:33,676 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 12 treesize of output 14 [2021-11-02 22:28:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:33,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:34,151 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:34,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008355289] [2021-11-02 22:28:34,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008355289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:34,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:34,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-02 22:28:34,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807322178] [2021-11-02 22:28:34,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:28:34,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:28:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:28:34,154 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-02 22:28:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:35,969 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2021-11-02 22:28:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:28:35,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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 16 [2021-11-02 22:28:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:35,972 INFO L225 Difference]: With dead ends: 207 [2021-11-02 22:28:35,972 INFO L226 Difference]: Without dead ends: 207 [2021-11-02 22:28:35,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:28:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-02 22:28:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 152. [2021-11-02 22:28:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 148 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2021-11-02 22:28:35,980 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 16 [2021-11-02 22:28:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:35,981 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2021-11-02 22:28:35,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-02 22:28:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2021-11-02 22:28:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:28:35,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:35,983 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:35,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:36,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:36,192 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1032376661, now seen corresponding path program 1 times [2021-11-02 22:28:36,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:36,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277741709] [2021-11-02 22:28:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:36,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:36,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:36,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:36,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:28:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:28:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:36,448 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 [2021-11-02 22:28:36,487 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:28:36,489 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 17 treesize of output 17 [2021-11-02 22:28:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:36,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:36,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:36,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277741709] [2021-11-02 22:28:36,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277741709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:36,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:36,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:28:36,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753100770] [2021-11-02 22:28:36,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:28:36,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:36,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:28:36,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:28:36,641 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-02 22:28:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:37,154 INFO L93 Difference]: Finished difference Result 198 states and 208 transitions. [2021-11-02 22:28:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:28:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 18 [2021-11-02 22:28:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:37,158 INFO L225 Difference]: With dead ends: 198 [2021-11-02 22:28:37,158 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 22:28:37,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:28:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 22:28:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 153. [2021-11-02 22:28:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 149 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2021-11-02 22:28:37,167 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 18 [2021-11-02 22:28:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:37,167 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2021-11-02 22:28:37,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-02 22:28:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2021-11-02 22:28:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:28:37,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:37,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:37,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:37,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:37,383 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1940508980, now seen corresponding path program 1 times [2021-11-02 22:28:37,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:37,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240646427] [2021-11-02 22:28:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:37,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:37,387 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:37,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:28:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:28:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:37,639 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 [2021-11-02 22:28:37,656 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 20 treesize of output 16 [2021-11-02 22:28:37,681 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 21 treesize of output 13 [2021-11-02 22:28:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:37,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:37,793 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:37,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240646427] [2021-11-02 22:28:37,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240646427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:37,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:37,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:28:37,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144890529] [2021-11-02 22:28:37,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:28:37,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:37,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:28:37,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:28:37,796 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-02 22:28:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:38,345 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-11-02 22:28:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:28:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2021-11-02 22:28:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:38,347 INFO L225 Difference]: With dead ends: 152 [2021-11-02 22:28:38,347 INFO L226 Difference]: Without dead ends: 152 [2021-11-02 22:28:38,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:28:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-02 22:28:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-02 22:28:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 109 states have (on average 1.4678899082568808) internal successors, (160), 148 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2021-11-02 22:28:38,354 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 19 [2021-11-02 22:28:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:38,355 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2021-11-02 22:28:38,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-02 22:28:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2021-11-02 22:28:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:28:38,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:38,357 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:38,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-02 22:28:38,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:38,567 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1940508979, now seen corresponding path program 1 times [2021-11-02 22:28:38,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:38,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286063821] [2021-11-02 22:28:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:38,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:38,572 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:38,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:28:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:28:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:38,861 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 [2021-11-02 22:28:38,895 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 [2021-11-02 22:28:38,903 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 [2021-11-02 22:28:38,958 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 [2021-11-02 22:28:38,967 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 [2021-11-02 22:28:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:38,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:39,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:39,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286063821] [2021-11-02 22:28:39,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286063821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:39,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:39,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 22:28:39,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871402702] [2021-11-02 22:28:39,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:28:39,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:28:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:28:39,285 INFO L87 Difference]: Start difference. First operand 152 states and 163 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, (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) [2021-11-02 22:28:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:40,733 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2021-11-02 22:28:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:28:40,734 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, (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 19 [2021-11-02 22:28:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:40,735 INFO L225 Difference]: With dead ends: 151 [2021-11-02 22:28:40,735 INFO L226 Difference]: Without dead ends: 151 [2021-11-02 22:28:40,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:28:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-02 22:28:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-02 22:28:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 147 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2021-11-02 22:28:40,742 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 19 [2021-11-02 22:28:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:40,743 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2021-11-02 22:28:40,743 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, (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) [2021-11-02 22:28:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2021-11-02 22:28:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:28:40,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:40,744 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:40,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:40,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:40,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 731794229, now seen corresponding path program 1 times [2021-11-02 22:28:40,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:40,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018740044] [2021-11-02 22:28:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:40,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:40,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:40,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:28:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:41,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:28:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:41,262 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 13 treesize of output 9 [2021-11-02 22:28:41,384 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 [2021-11-02 22:28:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:41,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:41,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:41,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018740044] [2021-11-02 22:28:41,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018740044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:41,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:41,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-02 22:28:41,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130606685] [2021-11-02 22:28:41,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:28:41,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:28:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:28:41,525 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-11-02 22:28:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:42,235 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2021-11-02 22:28:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:28:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 21 [2021-11-02 22:28:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:42,238 INFO L225 Difference]: With dead ends: 208 [2021-11-02 22:28:42,238 INFO L226 Difference]: Without dead ends: 208 [2021-11-02 22:28:42,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:28:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-02 22:28:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 156. [2021-11-02 22:28:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 114 states have (on average 1.4385964912280702) internal successors, (164), 152 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2021-11-02 22:28:42,244 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 21 [2021-11-02 22:28:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:42,244 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2021-11-02 22:28:42,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-11-02 22:28:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2021-11-02 22:28:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:28:42,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:42,246 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:42,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:42,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:42,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash 81604430, now seen corresponding path program 1 times [2021-11-02 22:28:42,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:42,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090251378] [2021-11-02 22:28:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:42,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:42,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:42,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:28:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:28:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:42,869 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 [2021-11-02 22:28:42,936 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:28:42,936 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 25 treesize of output 32 [2021-11-02 22:28:43,003 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 24 treesize of output 20 [2021-11-02 22:28:43,227 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:28:43,228 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-11-02 22:28:43,374 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:28:43,375 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 43 [2021-11-02 22:28:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:43,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:28:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:45,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:28:45,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090251378] [2021-11-02 22:28:45,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090251378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:45,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:45,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 6] imperfect sequences [] total 13 [2021-11-02 22:28:45,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162415550] [2021-11-02 22:28:45,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:28:45,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:28:45,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:28:45,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2021-11-02 22:28:45,661 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-11-02 22:28:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:47,630 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2021-11-02 22:28:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:28:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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 23 [2021-11-02 22:28:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:47,632 INFO L225 Difference]: With dead ends: 186 [2021-11-02 22:28:47,632 INFO L226 Difference]: Without dead ends: 186 [2021-11-02 22:28:47,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=142, Invalid=363, Unknown=1, NotChecked=0, Total=506 [2021-11-02 22:28:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-02 22:28:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-11-02 22:28:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 114 states have (on average 1.4298245614035088) internal successors, (163), 151 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2021-11-02 22:28:47,638 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 23 [2021-11-02 22:28:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:47,639 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2021-11-02 22:28:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-11-02 22:28:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2021-11-02 22:28:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:28:47,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:47,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:47,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:47,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:28:47,851 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:28:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash 81604431, now seen corresponding path program 1 times [2021-11-02 22:28:47,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:28:47,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111650018] [2021-11-02 22:28:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:47,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:28:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:28:47,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:28:47,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:28:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:48,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:28:48,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:48,151 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 [2021-11-02 22:28:48,202 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:28:48,202 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 18 treesize of output 18 [2021-11-02 22:28:48,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-02 22:28:48,250 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 [2021-11-02 22:28:48,258 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 21 treesize of output 17 [2021-11-02 22:28:48,367 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:28:48,368 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-02 22:28:48,383 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:28:48,383 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 59 treesize of output 54 [2021-11-02 22:28:48,516 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:28:48,517 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-11-02 22:28:48,525 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:28:48,526 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-11-02 22:28:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:48,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:29:01,754 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse1 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset))))) (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.offset))) c_main_~end~0.base) c_main_~end~0.offset))) (bvule .cse2 (bvadd (_ bv4 32) .cse2))))) is different from false [2021-11-02 22:29:01,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:01,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:02,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:29:02,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111650018] [2021-11-02 22:29:02,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111650018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:02,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:02,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-02 22:29:02,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540625426] [2021-11-02 22:29:02,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:29:02,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:29:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:29:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=4, NotChecked=26, Total=240 [2021-11-02 22:29:02,069 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-11-02 22:29:39,368 WARN L207 SmtUtils]: Spent 10.75 s on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-11-02 22:29:41,432 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (and (= (_ bv0 32) c_main_~end~0.offset) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset)) (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) .cse0 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem7.base|) .cse0 c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset))))) (= |c_main_#t~mem8.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~end~0.base)))))) (_ bv1 1))) (exists ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse2 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (and (= c_main_~end~0.base (select (select |c_#memory_$Pointer$.base| .cse1) .cse2)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2) c_main_~end~0.offset)))) (= (_ bv12 32) (select |c_#length| c_main_~end~0.base)) (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (bvule .cse3 (bvadd (_ bv4 32) .cse3)))) (= (_ bv12 32) (select |c_#length| |c_main_#t~mem8.base|)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_main_~list~0.base)) (_ bv1 1))) (= (select |c_#length| .cse4) (_ bv12 32)) (not (= .cse4 c_main_~end~0.base)))) is different from false [2021-11-02 22:29:51,249 WARN L207 SmtUtils]: Spent 6.72 s on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-11-02 22:30:04,679 WARN L207 SmtUtils]: Spent 5.60 s on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-11-02 22:30:06,687 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (and (= (_ bv0 32) c_main_~end~0.offset) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset)) (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) .cse0 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem7.base|) .cse0 c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset))))) (= |c_main_#t~mem8.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~end~0.base)))))) (_ bv1 1))) (exists ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse2 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (and (= c_main_~end~0.base (select (select |c_#memory_$Pointer$.base| .cse1) .cse2)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2) c_main_~end~0.offset)))) (= (_ bv12 32) (select |c_#length| c_main_~end~0.base)) (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (bvule .cse3 (bvadd (_ bv4 32) .cse3)))) (= (_ bv12 32) (select |c_#length| |c_main_#t~mem8.base|)) (= (select |c_#length| .cse4) (_ bv12 32)) (not (= .cse4 c_main_~end~0.base)))) is different from false [2021-11-02 22:30:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:21,396 INFO L93 Difference]: Finished difference Result 293 states and 312 transitions. [2021-11-02 22:30:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:30:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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 23 [2021-11-02 22:30:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:21,400 INFO L225 Difference]: With dead ends: 293 [2021-11-02 22:30:21,401 INFO L226 Difference]: Without dead ends: 293 [2021-11-02 22:30:21,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 87.3s TimeCoverageRelationStatistics Valid=520, Invalid=1827, Unknown=17, NotChecked=288, Total=2652 [2021-11-02 22:30:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-02 22:30:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 150. [2021-11-02 22:30:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 146 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2021-11-02 22:30:21,410 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 23 [2021-11-02 22:30:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:21,410 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2021-11-02 22:30:21,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-11-02 22:30:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2021-11-02 22:30:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:30:21,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:21,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:21,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:21,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:21,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1916056628, now seen corresponding path program 1 times [2021-11-02 22:30:21,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:21,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871936393] [2021-11-02 22:30:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:21,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:21,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:21,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:21,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 22:30:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:21,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:30:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:21,963 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 13 treesize of output 9 [2021-11-02 22:30:22,122 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 [2021-11-02 22:30:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:22,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:22,323 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:22,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871936393] [2021-11-02 22:30:22,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871936393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:22,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:22,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-11-02 22:30:22,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642125029] [2021-11-02 22:30:22,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:30:22,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:30:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:30:22,325 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-02 22:30:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:23,413 INFO L93 Difference]: Finished difference Result 201 states and 215 transitions. [2021-11-02 22:30:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:30:23,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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 28 [2021-11-02 22:30:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:23,415 INFO L225 Difference]: With dead ends: 201 [2021-11-02 22:30:23,415 INFO L226 Difference]: Without dead ends: 201 [2021-11-02 22:30:23,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:30:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-02 22:30:23,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2021-11-02 22:30:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 118 states have (on average 1.3728813559322033) internal successors, (162), 150 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2021-11-02 22:30:23,422 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 28 [2021-11-02 22:30:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2021-11-02 22:30:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-02 22:30:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2021-11-02 22:30:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:30:23,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:23,425 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-02 22:30:23,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:23,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:23,625 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1874038375, now seen corresponding path program 1 times [2021-11-02 22:30:23,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:23,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511124924] [2021-11-02 22:30:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:23,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:23,630 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:23,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 22:30:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:30:24,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:24,113 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 [2021-11-02 22:30:24,126 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 [2021-11-02 22:30:24,200 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 22:30:24,201 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 21 treesize of output 20 [2021-11-02 22:30:24,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:24,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-02 22:30:24,363 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-02 22:30:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 23 [2021-11-02 22:30:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:24,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-02 22:30:24,894 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 22:30:24,894 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 47 treesize of output 33 [2021-11-02 22:30:24,900 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 22:30:24,901 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 27 treesize of output 13 [2021-11-02 22:30:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:24,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:25,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:25,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511124924] [2021-11-02 22:30:25,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511124924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:30:25,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:25,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-02 22:30:25,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867190787] [2021-11-02 22:30:25,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:30:25,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:30:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:30:25,439 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-02 22:30:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:27,509 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2021-11-02 22:30:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:30:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 28 [2021-11-02 22:30:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:27,511 INFO L225 Difference]: With dead ends: 177 [2021-11-02 22:30:27,511 INFO L226 Difference]: Without dead ends: 177 [2021-11-02 22:30:27,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:30:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-02 22:30:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-11-02 22:30:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 121 states have (on average 1.3636363636363635) internal successors, (165), 153 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2021-11-02 22:30:27,518 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 28 [2021-11-02 22:30:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:27,519 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2021-11-02 22:30:27,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-02 22:30:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2021-11-02 22:30:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:30:27,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:27,521 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:27,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:27,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:27,755 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr40ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 956943814, now seen corresponding path program 1 times [2021-11-02 22:30:27,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:27,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571471106] [2021-11-02 22:30:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:27,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:27,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:27,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 22:30:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:30:28,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:28,165 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 13 treesize of output 9 [2021-11-02 22:30:28,185 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 19 treesize of output 7 [2021-11-02 22:30:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:28,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:28,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:28,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571471106] [2021-11-02 22:30:28,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571471106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:28,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:28,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:30:28,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732779862] [2021-11-02 22:30:28,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:30:28,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:30:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:30:28,287 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-11-02 22:30:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:28,678 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-11-02 22:30:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:30:28,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 28 [2021-11-02 22:30:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:28,680 INFO L225 Difference]: With dead ends: 159 [2021-11-02 22:30:28,681 INFO L226 Difference]: Without dead ends: 159 [2021-11-02 22:30:28,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:30:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-02 22:30:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-11-02 22:30:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 120 states have (on average 1.3583333333333334) internal successors, (163), 151 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2021-11-02 22:30:28,687 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 28 [2021-11-02 22:30:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:28,688 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2021-11-02 22:30:28,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-11-02 22:30:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2021-11-02 22:30:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:30:28,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:28,690 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:28,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:28,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:28,899 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:28,900 INFO L85 PathProgramCache]: Analyzing trace with hash 761725907, now seen corresponding path program 1 times [2021-11-02 22:30:28,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:28,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153143974] [2021-11-02 22:30:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:28,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:28,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:28,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:28,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 22:30:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:30:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:29,381 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 [2021-11-02 22:30:29,396 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 21 treesize of output 17 [2021-11-02 22:30:29,429 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 21 treesize of output 13 [2021-11-02 22:30:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:29,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:29,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153143974] [2021-11-02 22:30:29,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153143974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:29,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:29,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:30:29,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388589900] [2021-11-02 22:30:29,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:30:29,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:30:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:30:29,542 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-11-02 22:30:30,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:30,311 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2021-11-02 22:30:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:30:30,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 30 [2021-11-02 22:30:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:30,313 INFO L225 Difference]: With dead ends: 154 [2021-11-02 22:30:30,314 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 22:30:30,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 22:30:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-02 22:30:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 120 states have (on average 1.35) internal successors, (162), 150 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2021-11-02 22:30:30,320 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 30 [2021-11-02 22:30:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:30,321 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2021-11-02 22:30:30,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-11-02 22:30:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2021-11-02 22:30:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:30:30,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:30,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:30,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:30,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:30,538 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 761725908, now seen corresponding path program 1 times [2021-11-02 22:30:30,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:30,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140165988] [2021-11-02 22:30:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:30,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:30,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:30,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:30,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 22:30:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:30:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:31,034 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 [2021-11-02 22:30:31,066 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 [2021-11-02 22:30:31,075 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 [2021-11-02 22:30:31,128 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 [2021-11-02 22:30:31,133 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 [2021-11-02 22:30:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:31,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:31,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:31,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140165988] [2021-11-02 22:30:31,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140165988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:31,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:31,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 22:30:31,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028314752] [2021-11-02 22:30:31,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:30:31,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:30:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:30:31,508 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-11-02 22:30:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:32,753 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2021-11-02 22:30:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:30:32,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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 30 [2021-11-02 22:30:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:32,755 INFO L225 Difference]: With dead ends: 153 [2021-11-02 22:30:32,755 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 22:30:32,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:30:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 22:30:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-02 22:30:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 149 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2021-11-02 22:30:32,762 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 30 [2021-11-02 22:30:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:32,762 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2021-11-02 22:30:32,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-11-02 22:30:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2021-11-02 22:30:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:30:32,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:32,784 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:32,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:32,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:32,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1675711137, now seen corresponding path program 1 times [2021-11-02 22:30:32,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:32,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828269112] [2021-11-02 22:30:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:32,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:32,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:32,998 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:33,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 22:30:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:30:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:33,624 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 [2021-11-02 22:30:33,638 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 [2021-11-02 22:30:33,718 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:30:33,718 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 27 treesize of output 11 [2021-11-02 22:30:33,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 11 [2021-11-02 22:30:33,813 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 [2021-11-02 22:30:33,817 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 [2021-11-02 22:30:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:34,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:34,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828269112] [2021-11-02 22:30:34,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828269112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:34,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:34,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-02 22:30:34,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584654915] [2021-11-02 22:30:34,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:30:34,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:30:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:34,036 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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) [2021-11-02 22:30:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:34,656 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-11-02 22:30:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:30:34,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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 31 [2021-11-02 22:30:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:34,658 INFO L225 Difference]: With dead ends: 152 [2021-11-02 22:30:34,658 INFO L226 Difference]: Without dead ends: 152 [2021-11-02 22:30:34,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:30:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-02 22:30:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-02 22:30:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 147 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2021-11-02 22:30:34,664 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 31 [2021-11-02 22:30:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:34,665 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2021-11-02 22:30:34,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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) [2021-11-02 22:30:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2021-11-02 22:30:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:30:34,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:34,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:34,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:34,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:34,884 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash 254464259, now seen corresponding path program 1 times [2021-11-02 22:30:34,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:34,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090110345] [2021-11-02 22:30:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:34,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:34,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:34,888 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:34,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 22:30:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:35,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:30:35,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:35,411 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 [2021-11-02 22:30:35,449 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 22:30:35,450 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 14 treesize of output 19 [2021-11-02 22:30:35,546 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 22:30:35,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-11-02 22:30:35,599 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 20 treesize of output 16 [2021-11-02 22:30:35,753 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:30:35,753 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-02 22:30:35,853 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:30:35,854 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2021-11-02 22:30:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:35,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:38,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (not (= c_main_~null~0.base (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem7.base|) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset)))) is different from false [2021-11-02 22:30:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:44,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:44,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090110345] [2021-11-02 22:30:44,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090110345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:44,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:44,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 8] imperfect sequences [] total 14 [2021-11-02 22:30:44,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661006336] [2021-11-02 22:30:44,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:30:44,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:30:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2021-11-02 22:30:44,258 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-11-02 22:30:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:48,366 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-11-02 22:30:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:30:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 33 [2021-11-02 22:30:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:48,368 INFO L225 Difference]: With dead ends: 171 [2021-11-02 22:30:48,368 INFO L226 Difference]: Without dead ends: 171 [2021-11-02 22:30:48,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=234, Invalid=639, Unknown=1, NotChecked=56, Total=930 [2021-11-02 22:30:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-02 22:30:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2021-11-02 22:30:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 125 states have (on average 1.32) internal successors, (165), 153 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2021-11-02 22:30:48,375 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 33 [2021-11-02 22:30:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:48,375 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2021-11-02 22:30:48,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-11-02 22:30:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2021-11-02 22:30:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:30:48,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:48,377 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:48,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:48,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:48,579 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr64ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash -948863100, now seen corresponding path program 1 times [2021-11-02 22:30:48,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:48,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312741319] [2021-11-02 22:30:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:48,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:48,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:48,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-02 22:30:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:30:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:48,985 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 13 treesize of output 9 [2021-11-02 22:30:49,089 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 19 treesize of output 7 [2021-11-02 22:30:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:30:49,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:30:49,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:49,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312741319] [2021-11-02 22:30:49,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312741319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:49,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:49,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 22:30:49,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304480694] [2021-11-02 22:30:49,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:30:49,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:30:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:30:49,271 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-02 22:30:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:49,700 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2021-11-02 22:30:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:30:49,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 34 [2021-11-02 22:30:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:49,703 INFO L225 Difference]: With dead ends: 167 [2021-11-02 22:30:49,703 INFO L226 Difference]: Without dead ends: 167 [2021-11-02 22:30:49,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-02 22:30:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2021-11-02 22:30:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 128 states have (on average 1.3125) internal successors, (168), 156 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2021-11-02 22:30:49,710 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 34 [2021-11-02 22:30:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:49,710 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2021-11-02 22:30:49,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-02 22:30:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2021-11-02 22:30:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:30:49,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:49,712 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:49,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-02 22:30:49,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:49,919 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr74ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -927868390, now seen corresponding path program 1 times [2021-11-02 22:30:49,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:49,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571817463] [2021-11-02 22:30:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:49,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:49,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:49,922 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:49,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-02 22:30:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:30:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:30:50,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:30:50,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:50,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571817463] [2021-11-02 22:30:50,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571817463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:50,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:50,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:30:50,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731940960] [2021-11-02 22:30:50,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:30:50,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:30:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:30:50,605 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-02 22:30:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:50,730 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2021-11-02 22:30:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:30:50,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2021-11-02 22:30:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:50,732 INFO L225 Difference]: With dead ends: 161 [2021-11-02 22:30:50,732 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 22:30:50,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:30:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 22:30:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-02 22:30:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 129 states have (on average 1.302325581395349) internal successors, (168), 157 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2021-11-02 22:30:50,739 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 34 [2021-11-02 22:30:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:50,740 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2021-11-02 22:30:50,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-02 22:30:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2021-11-02 22:30:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:30:50,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:50,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:50,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:50,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:50,942 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:50,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1475100757, now seen corresponding path program 1 times [2021-11-02 22:30:50,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:50,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292305297] [2021-11-02 22:30:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:50,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:50,944 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:50,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-02 22:30:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:30:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:51,656 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:30:51,657 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 24 treesize of output 31 [2021-11-02 22:30:51,719 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 25 treesize of output 21 [2021-11-02 22:30:51,905 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:30:51,906 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-11-02 22:30:52,050 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:30:52,051 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 46 [2021-11-02 22:30:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:52,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:30:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:56,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:30:56,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292305297] [2021-11-02 22:30:56,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292305297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:56,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:56,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-11-02 22:30:56,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700853260] [2021-11-02 22:30:56,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:30:56,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:30:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:30:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:30:56,454 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-11-02 22:30:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:58,482 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-11-02 22:30:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:30:58,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 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 34 [2021-11-02 22:30:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:58,484 INFO L225 Difference]: With dead ends: 170 [2021-11-02 22:30:58,484 INFO L226 Difference]: Without dead ends: 170 [2021-11-02 22:30:58,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:30:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-02 22:30:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-11-02 22:30:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 129 states have (on average 1.2945736434108528) internal successors, (167), 156 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2021-11-02 22:30:58,489 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 34 [2021-11-02 22:30:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:58,490 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2021-11-02 22:30:58,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-11-02 22:30:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2021-11-02 22:30:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:30:58,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:58,491 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:58,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:58,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:30:58,705 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:30:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1475100758, now seen corresponding path program 1 times [2021-11-02 22:30:58,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:30:58,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697095672] [2021-11-02 22:30:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:58,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:30:58,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:30:58,706 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:30:58,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-02 22:30:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:30:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:59,259 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 [2021-11-02 22:30:59,301 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 [2021-11-02 22:30:59,330 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:30:59,330 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 24 treesize of output 31 [2021-11-02 22:30:59,399 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 29 treesize of output 25 [2021-11-02 22:30:59,618 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:30:59,618 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-11-02 22:30:59,758 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:30:59,758 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 52 [2021-11-02 22:31:00,145 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 22:31:00,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2021-11-02 22:31:00,158 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 12 treesize of output 14 [2021-11-02 22:31:00,227 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 [2021-11-02 22:31:00,236 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 21 treesize of output 17 [2021-11-02 22:31:00,452 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:31:00,453 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-02 22:31:00,477 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:31:00,477 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 59 treesize of output 54 [2021-11-02 22:31:00,635 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:31:00,636 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 47 [2021-11-02 22:31:00,642 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:31:00,642 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-02 22:31:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:00,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:31:18,061 WARN L207 SmtUtils]: Spent 8.81 s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-02 22:31:27,349 WARN L207 SmtUtils]: Spent 6.11 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 22:31:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:51,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:31:51,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697095672] [2021-11-02 22:31:51,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697095672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:51,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:51,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 12] imperfect sequences [] total 25 [2021-11-02 22:31:51,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011965057] [2021-11-02 22:31:51,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:31:51,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:31:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:31:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=564, Unknown=7, NotChecked=0, Total=650 [2021-11-02 22:31:51,034 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 26 states have internal predecessors, (56), 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) [2021-11-02 22:32:03,379 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#length| c_main_~end~0.base)) (.cse4 (bvadd (_ bv4 32) c_main_~end~0.offset)) (.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (and (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base|) (bvadd |main_#t~mem11.offset| (_ bv4 32)) c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1)))))) (_ bv1 1))) (exists ((v_arrayElimCell_57 (_ BitVec 32)) (v_arrayElimCell_55 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_55)))))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg .cse2)) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (bvneg (bvneg (bvneg (select |c_#valid| v_arrayElimCell_57)))))) (not (= v_arrayElimCell_57 c_main_~end~0.base))))) (exists ((v_arrayElimCell_55 (_ BitVec 1))) (let ((.cse3 (bvneg (bvneg v_arrayElimCell_55)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg .cse3)))) (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_main_~end~0.base)) .cse3))))) (bvule .cse4 .cse5) (= (_ bv12 32) .cse5) (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse6 (bvadd |main_#t~mem11.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base|) .cse6 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem11.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem11.base|) .cse6 c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset))))) (exists ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse8 (bvadd |main_#t~mem11.offset| (_ bv4 32)))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8) c_main_~end~0.offset) (= c_main_~end~0.base (select (select |c_#memory_$Pointer$.base| .cse7) .cse8))))) (bvule c_main_~end~0.offset .cse4) (exists ((|main_#t~mem7.offset| (_ BitVec 32))) (= c_main_~end~0.base (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (bvadd (_ bv4 32) |main_#t~mem7.offset|)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_main_~list~0.base)) (_ bv1 1))) (= (select |c_#length| .cse1) (_ bv12 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~end~0.base))))))) (_ bv1 1))) (not (= .cse1 c_main_~end~0.base)))) is different from false [2021-11-02 22:32:25,450 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#length| c_main_~end~0.base)) (.cse4 (bvadd (_ bv4 32) c_main_~end~0.offset)) (.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (and (= |c_main_#t~mem12.offset| (_ bv0 32)) (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base|) (bvadd |main_#t~mem11.offset| (_ bv4 32)) c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1)))))) (_ bv1 1))) (= (select |c_#length| |c_main_#t~mem12.base|) (_ bv12 32)) (exists ((v_arrayElimCell_57 (_ BitVec 32)) (v_arrayElimCell_55 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_55)))))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg .cse2)) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (bvneg (bvneg (bvneg (select |c_#valid| v_arrayElimCell_57)))))) (not (= v_arrayElimCell_57 c_main_~end~0.base))))) (exists ((v_arrayElimCell_55 (_ BitVec 1))) (let ((.cse3 (bvneg (bvneg v_arrayElimCell_55)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg .cse3)))) (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_main_~end~0.base)) .cse3))))) (bvule .cse4 .cse5) (exists ((v_arrayElimCell_65 (_ BitVec 32))) (and (not (= v_arrayElimCell_65 |c_main_#t~mem12.base|)) (= (select |c_#length| v_arrayElimCell_65) (_ bv12 32)))) (= (_ bv12 32) .cse5) (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse6 (bvadd |main_#t~mem11.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem11.base|) .cse6 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem11.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem11.base|) .cse6 c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset))))) (exists ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse8 (bvadd |main_#t~mem11.offset| (_ bv4 32)))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8) c_main_~end~0.offset) (= c_main_~end~0.base (select (select |c_#memory_$Pointer$.base| .cse7) .cse8))))) (bvule c_main_~end~0.offset .cse4) (exists ((|main_#t~mem7.offset| (_ BitVec 32))) (= c_main_~end~0.base (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (bvadd (_ bv4 32) |main_#t~mem7.offset|)))) (= (select |c_#length| .cse1) (_ bv12 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~end~0.base))))))) (_ bv1 1))) (not (= .cse1 c_main_~end~0.base)))) is different from false [2021-11-02 22:32:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:26,834 INFO L93 Difference]: Finished difference Result 257 states and 274 transitions. [2021-11-02 22:32:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 22:32:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 26 states have internal predecessors, (56), 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 34 [2021-11-02 22:32:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:26,836 INFO L225 Difference]: With dead ends: 257 [2021-11-02 22:32:26,837 INFO L226 Difference]: Without dead ends: 257 [2021-11-02 22:32:26,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=798, Invalid=4453, Unknown=13, NotChecked=286, Total=5550 [2021-11-02 22:32:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-02 22:32:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 157. [2021-11-02 22:32:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 129 states have (on average 1.2713178294573644) internal successors, (164), 153 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 167 transitions. [2021-11-02 22:32:26,844 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 167 transitions. Word has length 34 [2021-11-02 22:32:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:26,845 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 167 transitions. [2021-11-02 22:32:26,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 26 states have internal predecessors, (56), 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) [2021-11-02 22:32:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 167 transitions. [2021-11-02 22:32:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:32:26,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:26,846 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1] [2021-11-02 22:32:26,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:27,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:32:27,064 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:32:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:27,065 INFO L85 PathProgramCache]: Analyzing trace with hash 282659883, now seen corresponding path program 1 times [2021-11-02 22:32:27,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:32:27,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835878840] [2021-11-02 22:32:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:27,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:32:27,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:32:27,066 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:32:27,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-02 22:32:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:32:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:28,142 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 [2021-11-02 22:32:28,147 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 [2021-11-02 22:32:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:28,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:32:28,761 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-02 22:32:28,761 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 28 treesize of output 27 [2021-11-02 22:32:28,770 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-02 22:32:28,771 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 27 treesize of output 19 [2021-11-02 22:32:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:28,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:32:28,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835878840] [2021-11-02 22:32:28,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835878840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:32:28,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:32:28,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-02 22:32:28,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363353330] [2021-11-02 22:32:28,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:32:28,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:32:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:32:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:32:28,932 INFO L87 Difference]: Start difference. First operand 157 states and 167 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2021-11-02 22:32:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:31,356 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2021-11-02 22:32:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:32:31,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 37 [2021-11-02 22:32:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:31,358 INFO L225 Difference]: With dead ends: 213 [2021-11-02 22:32:31,358 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 22:32:31,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:32:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 22:32:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 168. [2021-11-02 22:32:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 140 states have (on average 1.2642857142857142) internal successors, (177), 164 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 180 transitions. [2021-11-02 22:32:31,365 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 180 transitions. Word has length 37 [2021-11-02 22:32:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:31,366 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 180 transitions. [2021-11-02 22:32:31,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2021-11-02 22:32:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 180 transitions. [2021-11-02 22:32:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:32:31,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:31,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:31,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:31,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:32:31,600 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr77ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:32:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 172521460, now seen corresponding path program 1 times [2021-11-02 22:32:31,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:32:31,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125681196] [2021-11-02 22:32:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:31,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:32:31,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:32:31,603 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:32:31,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-02 22:32:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:32:32,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:32:32,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:32:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:32:32,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:32:32,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125681196] [2021-11-02 22:32:32,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125681196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:32,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:32,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:32:32,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765722403] [2021-11-02 22:32:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:32:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:32:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:32:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:32:32,669 INFO L87 Difference]: Start difference. First operand 168 states and 180 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 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) [2021-11-02 22:32:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:32,782 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2021-11-02 22:32:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:32:32,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2021-11-02 22:32:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:32,784 INFO L225 Difference]: With dead ends: 167 [2021-11-02 22:32:32,784 INFO L226 Difference]: Without dead ends: 167 [2021-11-02 22:32:32,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:32:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-02 22:32:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-02 22:32:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 140 states have (on average 1.25) internal successors, (175), 163 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2021-11-02 22:32:32,788 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 38 [2021-11-02 22:32:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:32,788 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2021-11-02 22:32:32,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 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) [2021-11-02 22:32:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2021-11-02 22:32:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:32:32,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:32,789 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:32,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:32,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:32:32,990 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr79ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:32:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1710589865, now seen corresponding path program 1 times [2021-11-02 22:32:32,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:32:32,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538991672] [2021-11-02 22:32:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:32,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:32:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:32:32,992 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:32:32,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-02 22:32:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:32:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:33,676 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-02 22:32:33,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-02 22:32:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:44,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:32:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:59,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:32:59,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538991672] [2021-11-02 22:32:59,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538991672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:32:59,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:32:59,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-02 22:32:59,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090096382] [2021-11-02 22:32:59,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:32:59,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:32:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:32:59,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=231, Unknown=9, NotChecked=0, Total=306 [2021-11-02 22:32:59,237 INFO L87 Difference]: Start difference. First operand 167 states and 178 transitions. Second operand has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 states have internal predecessors, (74), 2 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) [2021-11-02 22:33:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:12,433 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2021-11-02 22:33:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:33:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 states have internal predecessors, (74), 2 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 40 [2021-11-02 22:33:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:12,436 INFO L225 Difference]: With dead ends: 177 [2021-11-02 22:33:12,436 INFO L226 Difference]: Without dead ends: 152 [2021-11-02 22:33:12,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=99, Invalid=312, Unknown=9, NotChecked=0, Total=420 [2021-11-02 22:33:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-02 22:33:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-02 22:33:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 125 states have (on average 1.272) internal successors, (159), 148 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:33:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2021-11-02 22:33:12,442 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 40 [2021-11-02 22:33:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:12,442 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2021-11-02 22:33:12,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 states have internal predecessors, (74), 2 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) [2021-11-02 22:33:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2021-11-02 22:33:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:33:12,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:12,444 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:12,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:12,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:12,644 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:33:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash -790619226, now seen corresponding path program 1 times [2021-11-02 22:33:12,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:12,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578775362] [2021-11-02 22:33:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:12,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:12,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:12,646 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:12,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-02 22:33:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:33:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:13,548 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 [2021-11-02 22:33:13,593 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 13 treesize of output 9 [2021-11-02 22:33:13,707 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:33:13,707 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 14 treesize of output 14 [2021-11-02 22:33:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:13,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:33:13,790 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 [2021-11-02 22:33:13,973 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:33:13,974 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-11-02 22:33:14,002 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-02 22:33:14,002 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 62 treesize of output 34 [2021-11-02 22:33:14,130 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:33:14,130 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-11-02 22:33:14,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:33:14,294 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 22:33:14,295 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 27 treesize of output 26 [2021-11-02 22:33:14,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:14,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578775362] [2021-11-02 22:33:14,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.offset, main_~end~0.base] [2021-11-02 22:33:14,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [599510224] [2021-11-02 22:33:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:14,693 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-02 22:33:14,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 [2021-11-02 22:33:14,699 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-02 22:33:14,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-02 22:33:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:33:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:15,893 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 [2021-11-02 22:33:15,924 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 13 treesize of output 9 [2021-11-02 22:33:15,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:33:15,995 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 [2021-11-02 22:33:16,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:33:16,098 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 [2021-11-02 22:33:16,106 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 [2021-11-02 22:33:16,222 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 [2021-11-02 22:33:16,348 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:33:16,349 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 53 treesize of output 52 [2021-11-02 22:33:16,372 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-02 22:33:16,372 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 49 treesize of output 33 [2021-11-02 22:33:16,584 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 7 treesize of output 3 [2021-11-02 22:33:16,594 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:33:16,594 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 28 treesize of output 14 [2021-11-02 22:33:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:16,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-02 22:33:16,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:16,802 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-02 22:33:16,802 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 21 treesize of output 20 [2021-11-02 22:33:17,033 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 [2021-11-02 22:33:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:33:17,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:17,713 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 38 treesize of output 30 [2021-11-02 22:33:19,724 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (= (select (select (store |c_#memory_int| v_arrayElimCell_96 (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset))) (store (store (select |c_#memory_int| v_arrayElimCell_96) .cse0 v_DerPreprocessor_5) (bvadd (_ bv8 32) .cse0) ~unnamed1~0~BLACK))) c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset)) ~unnamed1~0~BLACK)) is different from false [2021-11-02 22:33:21,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (= ~unnamed1~0~BLACK (select (select (let ((.cse2 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse0 (store |c_#memory_int| |c_main_#t~mem7.base| (store (select |c_#memory_int| |c_main_#t~mem7.base|) .cse2 v_DerPreprocessor_6)))) (store .cse0 v_arrayElimCell_96 (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) .cse2 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (store (store (select .cse0 v_arrayElimCell_96) .cse1 v_DerPreprocessor_5) (bvadd (_ bv8 32) .cse1) ~unnamed1~0~BLACK))))) c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset)))) is different from false [2021-11-02 22:33:23,825 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (= ~unnamed1~0~BLACK (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse3 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse0 (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) .cse3 v_DerPreprocessor_6)))) (store .cse0 v_arrayElimCell_96 (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse3 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (store (store (select .cse0 v_arrayElimCell_96) .cse1 v_DerPreprocessor_5) (bvadd (_ bv8 32) .cse1) ~unnamed1~0~BLACK))))) c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset)))) is different from false [2021-11-02 22:33:26,432 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (let ((.cse5 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse0 (let ((.cse6 (store |c_#memory_int| c_main_~end~0.base (store (select |c_#memory_int| c_main_~end~0.base) c_main_~end~0.offset v_DerPreprocessor_7)))) (store .cse6 |c_main_#t~malloc6.base| (store (select .cse6 |c_main_#t~malloc6.base|) .cse5 v_DerPreprocessor_6))))) (let ((.cse3 (= .cse5 c_main_~end~0.offset)) (.cse4 (= c_main_~end~0.base |c_main_#t~malloc6.base|)) (.cse1 (select .cse0 v_arrayElimCell_96)) (.cse2 (bvadd (_ bv8 32) c_main_~list~0.offset))) (or (and (= ~unnamed1~0~BLACK (select (select (store .cse0 v_arrayElimCell_96 (store (store .cse1 |c_main_#t~malloc6.offset| v_DerPreprocessor_5) (bvadd (_ bv8 32) |c_main_#t~malloc6.offset|) ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse2)) (or (not .cse3) (not .cse4))) (and .cse3 .cse4 (= ~unnamed1~0~BLACK (select (select (store .cse0 v_arrayElimCell_96 (store (store .cse1 c_main_~end~0.offset v_DerPreprocessor_5) (bvadd (_ bv8 32) c_main_~end~0.offset) ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse2)))))))) is different from false [2021-11-02 22:33:30,015 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|v_main_#t~malloc6.base_19| (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (let ((.cse5 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse2 (let ((.cse6 (store |c_#memory_int| c_main_~end~0.base (store (select |c_#memory_int| c_main_~end~0.base) c_main_~end~0.offset v_DerPreprocessor_7)))) (store .cse6 |v_main_#t~malloc6.base_19| (store (select .cse6 |v_main_#t~malloc6.base_19|) .cse5 v_DerPreprocessor_6))))) (let ((.cse0 (= |v_main_#t~malloc6.base_19| c_main_~end~0.base)) (.cse1 (= .cse5 c_main_~end~0.offset)) (.cse3 (select .cse2 v_arrayElimCell_96)) (.cse4 (bvadd (_ bv8 32) c_main_~list~0.offset))) (or (not (= (_ bv0 1) (select |c_#valid| |v_main_#t~malloc6.base_19|))) (and .cse0 .cse1 (= ~unnamed1~0~BLACK (select (select (store .cse2 v_arrayElimCell_96 (store (store .cse3 c_main_~end~0.offset v_DerPreprocessor_5) (bvadd (_ bv8 32) c_main_~end~0.offset) ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse4))) (and (or (not .cse0) (not .cse1)) (= ~unnamed1~0~BLACK (select (select (store .cse2 v_arrayElimCell_96 (store (store .cse3 (_ bv0 32) v_DerPreprocessor_5) (_ bv8 32) ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse4)))))))) is different from false [2021-11-02 22:33:33,001 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|v_main_#t~malloc6.base_19| (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (let ((.cse3 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse0 (let ((.cse4 (store |c_#memory_int| c_main_~list~0.base (store (select |c_#memory_int| c_main_~list~0.base) c_main_~list~0.offset v_DerPreprocessor_7)))) (store .cse4 |v_main_#t~malloc6.base_19| (store (select .cse4 |v_main_#t~malloc6.base_19|) .cse3 v_DerPreprocessor_6))))) (let ((.cse1 (select .cse0 v_arrayElimCell_96)) (.cse2 (bvadd (_ bv8 32) c_main_~list~0.offset))) (or (not (= (_ bv0 1) (select |c_#valid| |v_main_#t~malloc6.base_19|))) (= ~unnamed1~0~BLACK (select (select (store .cse0 v_arrayElimCell_96 (store (store .cse1 (_ bv0 32) v_DerPreprocessor_5) (_ bv8 32) ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse2)) (and (= .cse3 c_main_~list~0.offset) (= |v_main_#t~malloc6.base_19| c_main_~list~0.base) (= ~unnamed1~0~BLACK (select (select (store .cse0 v_arrayElimCell_96 (store (store .cse1 c_main_~list~0.offset v_DerPreprocessor_5) .cse2 ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse2)))))))) is different from false [2021-11-02 22:33:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-02 22:33:37,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [599510224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:33:37,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:37,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-02 22:33:37,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93850910] [2021-11-02 22:33:37,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:33:37,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:33:37,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=557, Unknown=6, NotChecked=330, Total=1056 [2021-11-02 22:33:37,723 INFO L87 Difference]: Start difference. First operand 152 states and 162 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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) [2021-11-02 22:33:40,407 WARN L838 $PredicateComparison]: unable to prove that (and (= c_main_~list~0.base c_main_~end~0.base) (not (= c_main_~list~0.base |c_main_#t~malloc6.base|)) (= ~unnamed1~0~BLACK (select (select |c_#memory_int| c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset))) (= c_main_~list~0.offset c_main_~end~0.offset) (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (let ((.cse5 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse0 (let ((.cse6 (store |c_#memory_int| c_main_~end~0.base (store (select |c_#memory_int| c_main_~end~0.base) c_main_~end~0.offset v_DerPreprocessor_7)))) (store .cse6 |c_main_#t~malloc6.base| (store (select .cse6 |c_main_#t~malloc6.base|) .cse5 v_DerPreprocessor_6))))) (let ((.cse3 (= .cse5 c_main_~end~0.offset)) (.cse4 (= c_main_~end~0.base |c_main_#t~malloc6.base|)) (.cse1 (select .cse0 v_arrayElimCell_96)) (.cse2 (bvadd (_ bv8 32) c_main_~list~0.offset))) (or (and (= ~unnamed1~0~BLACK (select (select (store .cse0 v_arrayElimCell_96 (store (store .cse1 |c_main_#t~malloc6.offset| v_DerPreprocessor_5) (bvadd (_ bv8 32) |c_main_#t~malloc6.offset|) ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse2)) (or (not .cse3) (not .cse4))) (and .cse3 .cse4 (= ~unnamed1~0~BLACK (select (select (store .cse0 v_arrayElimCell_96 (store (store .cse1 c_main_~end~0.offset v_DerPreprocessor_5) (bvadd (_ bv8 32) c_main_~end~0.offset) ~unnamed1~0~BLACK)) c_main_~list~0.base) .cse2)))))))) (= (_ bv0 32) |c_main_#t~malloc6.offset|) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_main_~list~0.base)) (_ bv1 1))) (= c_main_~list~0.offset (_ bv0 32))) is different from false [2021-11-02 22:33:42,454 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset)) (= c_main_~list~0.base c_main_~end~0.base) (= ~unnamed1~0~BLACK (select (select |c_#memory_int| c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset))) (= c_main_~list~0.offset c_main_~end~0.offset) (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (= ~unnamed1~0~BLACK (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse3 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse0 (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) .cse3 v_DerPreprocessor_6)))) (store .cse0 v_arrayElimCell_96 (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse3 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (store (store (select .cse0 v_arrayElimCell_96) .cse1 v_DerPreprocessor_5) (bvadd (_ bv8 32) .cse1) ~unnamed1~0~BLACK))))) c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset)))) (= c_main_~list~0.offset (_ bv0 32)) (not (= (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset) c_main_~list~0.base))) is different from false [2021-11-02 22:33:44,474 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset)) (= c_main_~list~0.base c_main_~end~0.base) (= ~unnamed1~0~BLACK (select (select |c_#memory_int| c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset))) (not (= c_main_~list~0.base |c_main_#t~mem7.base|)) (= c_main_~list~0.offset c_main_~end~0.offset) (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem7.offset| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (= ~unnamed1~0~BLACK (select (select (let ((.cse2 (bvadd (_ bv4 32) |main_#t~mem7.offset|))) (let ((.cse0 (store |c_#memory_int| |c_main_#t~mem7.base| (store (select |c_#memory_int| |c_main_#t~mem7.base|) .cse2 v_DerPreprocessor_6)))) (store .cse0 v_arrayElimCell_96 (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) .cse2 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset))) (store (store (select .cse0 v_arrayElimCell_96) .cse1 v_DerPreprocessor_5) (bvadd (_ bv8 32) .cse1) ~unnamed1~0~BLACK))))) c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset)))) (= c_main_~list~0.offset (_ bv0 32))) is different from false [2021-11-02 22:33:46,497 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset)) (= c_main_~list~0.base c_main_~end~0.base) (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_arrayElimCell_96 (_ BitVec 32))) (= (select (select (store |c_#memory_int| v_arrayElimCell_96 (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| c_main_~end~0.base) c_main_~end~0.offset))) (store (store (select |c_#memory_int| v_arrayElimCell_96) .cse0 v_DerPreprocessor_5) (bvadd (_ bv8 32) .cse0) ~unnamed1~0~BLACK))) c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset)) ~unnamed1~0~BLACK)) (exists ((|main_#t~mem7.offset| (_ BitVec 32)) (|main_#t~mem7.base| (_ BitVec 32))) (and (not (= c_main_~list~0.base |main_#t~mem7.base|)) (= (select (select |c_#memory_$Pointer$.offset| |main_#t~mem7.base|) (bvadd (_ bv4 32) |main_#t~mem7.offset|)) c_main_~end~0.offset))) (= ~unnamed1~0~BLACK (select (select |c_#memory_int| c_main_~list~0.base) (bvadd (_ bv8 32) c_main_~list~0.offset))) (= c_main_~list~0.offset c_main_~end~0.offset) (= c_main_~list~0.offset (_ bv0 32))) is different from false [2021-11-02 22:33:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:50,580 INFO L93 Difference]: Finished difference Result 260 states and 279 transitions. [2021-11-02 22:33:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:33:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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 40 [2021-11-02 22:33:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:50,583 INFO L225 Difference]: With dead ends: 260 [2021-11-02 22:33:50,583 INFO L226 Difference]: Without dead ends: 260 [2021-11-02 22:33:50,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=200, Invalid=642, Unknown=10, NotChecked=630, Total=1482 [2021-11-02 22:33:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-02 22:33:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 176. [2021-11-02 22:33:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 149 states have (on average 1.2416107382550337) internal successors, (185), 172 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:33:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2021-11-02 22:33:50,591 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 40 [2021-11-02 22:33:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:50,591 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2021-11-02 22:33:50,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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) [2021-11-02 22:33:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2021-11-02 22:33:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:33:50,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:50,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:50,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:50,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:51,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:51,009 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-11-02 22:33:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:51,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1562220946, now seen corresponding path program 1 times [2021-11-02 22:33:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:51,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890355884] [2021-11-02 22:33:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:51,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:51,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:51,011 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:51,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-02 22:33:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:33:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:52,081 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 [2021-11-02 22:33:52,132 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 22:33:52,133 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 14 treesize of output 19 [2021-11-02 22:33:52,263 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-02 22:33:52,264 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 40 [2021-11-02 22:33:52,337 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 20 treesize of output 16 [2021-11-02 22:33:52,454 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 13 treesize of output 9 [2021-11-02 22:33:52,604 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 22:33:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-02 22:33:52,644 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 20 treesize of output 16 [2021-11-02 22:33:52,820 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:33:52,820 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-02 22:33:52,925 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:33:52,925 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2021-11-02 22:33:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:33:53,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:09,663 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (not (= c_main_~null~0.base (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd |main_#t~mem11.offset| (_ bv4 32)) c_main_~end~0.base))) c_main_~end~0.base) c_main_~end~0.offset)))) is different from false [2021-11-02 22:34:09,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:09,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890355884] [2021-11-02 22:34:09,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~end~0.base] [2021-11-02 22:34:09,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688420414] [2021-11-02 22:34:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:09,823 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-02 22:34:09,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 [2021-11-02 22:34:09,832 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-02 22:34:09,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43d8323-763c-46cc-9d0f-7ffa74307d27/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-02 22:34:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:34:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:11,323 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 [2021-11-02 22:34:11,418 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:34:11,418 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 28 [2021-11-02 22:34:11,695 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-02 22:34:11,695 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 36 treesize of output 47 [2021-11-02 22:34:11,841 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 20 treesize of output 16 [2021-11-02 22:34:12,042 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 13 treesize of output 9 [2021-11-02 22:34:12,214 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 7 treesize of output 3 [2021-11-02 22:34:12,507 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-02 22:34:12,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 50